Alfred's Adult All-In-One Piano Course: Level 1
Kaydia Welcome to the forum! I'm not personally familiar with your piano, but apparently it has internal recording, so you could record and listen back without having to use any phone, tablet or computer. This is an AI generated description of the functionality:
Casio Privia PX-850 Recording
To record on the Casio Privia PX-850, follow these steps:
Press the SONG RECORDER button to activate the song recording mode. The indicator light will illuminate.
While holding down the FUNCTION button, press the SONG RECORDER (L/R) button to select the track you want to record on.
Press the SONG RECORDER button again to start recording. The indicator light will start flashing.
Play the desired song on the keyboard. The recorded track will play simultaneously with your performance.
To stop the recording, press the SONG RECORDER button.
To play back the recorded song, press the SONG button. The recorded track will start playing.
To adjust the tempo while the song is playing, press the SONG button again to stop playback, then use the TEMPO buttons or the + and - keys to adjust the tempo.
Press the SONG button once more to stop playback.
Additionally, you can save the recorded song to a USB flash drive. To do this, follow these steps:
While holding down the FUNCTION button, press the save keyboard key. This will cause the GRAND PIANO (CONCERT) button lamp to light.
Use the procedure below to save data you recorded on the Digital Piano to a USB flash drive as a MIDI file (SMF format 0).
For more detailed instructions, refer to the user manual or the online resources provided by Casio.
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candela I'm not personally familiar with your piano, but apparently it has internal recording, so you could record and listen back without having to use any phone, tablet or computer.
Hi candela. Last night I tried a recording on my phone and the audio was terrible. So I just now tried it out using the instructions you provided and, of course, it sounded great (the audio quality at least), so thank you very much for your help!
So, what did I learn from my first ever audio recording? The biggest thing was that hearing the pace while I was playing vs how the pace sounded on playback was a surprise. I thought I was playing the New World Symphony Theme in a 'moderately flowing' manner as indicated in the piece. However, while listening to the playback I nearly dozed off as it dragged along. I thought I'd settled on a nice tempo, but it turns out I was actually playing much slower than I'd realized.
Thanks to everyone for the suggestions/demands/arm-twisting/threats*/etc to record myself. I'm on board now. 
Edit: *just felt like throwing in a little dramatic flair
I like it!Kaydia in case you don't know already, Faber has audios of the pieces in two different tempos; practice and performance: https://pianoadventures.com/qr/ff1302/
I was aiming to match to practice tempo for most pieces. And just like you, I thought my tempo was OK until I've listened those recordings. Even "practice tempo"s were always faster 
Practice the piece first, paying attention to learning to read the notes on the scale, note values (half, quarter, eighth notes, etc and how long to hold them), tempo, key signatures, and counting. Then listen to/watch the recordings/you tube videos to see how close you got to the way it's supposed to be played.
If you practiced the piece first, you not only learn the piece but you also begin to learn to spot the rhythm and harmony/melody without needing to listen first. If you listen first, you'll have a harder time learning the other things you need to start picking up on.
I finished with both the left-hand and right-hand chords versions of "When the Saints Go Marching In" separately, then went through the challenge of connecting them together on the repeat without there being a gap in the timing. I ended up doing it by using only the left-hand chords version, instead of having to flip to another page. Also, the right-hand version doesn't have the words from the song written in, and I'm not sure why, but it was throwing me off.
Now, on to learning the F Major chord.
Congrats @Kaydia - sounds like you're making steady progress! Funny, I did the same with When the Saints - it's fun to play both versions back to back and finding ways to reduce the page turning time gap. In fact it's one of the pieces I still play on occasion - it's so happy and bouncy.
Mind you, page turning is a skill we need to learn at some point... in fact I may need to face it soon with my current piece (I just started Moonlight Sonata which is two double pages long, yikes).
Another piece I really enjoyed playing (and still do) is Mary Ann, I believe that you already had that one. But then again I enjoy calypso type music and it has a very cute left hand melody
Kaydia Congratulations with your first recording! 
I wouldn't bother too much with the tempo though in this stage. It will take a lot of time to get it up to speed - I think you'll learn more when you move on to new pieces. You can always go back a couple of months from now and surprise yourself by finding how much easier it all will be.
Also, don't bother yet with chords and scales. Too early!
As you see, Player1 and I disagree on quite a few things, but that is the nice thing about a forum. You get different answers and you choose the one that suits you the best. 
*
... feeling like the pianist on the Titanic ...
@Sophia I did enjoy the challenge of doing it in both hands. Also, I agree, it is happy and bouncy. And I also liked the Mary Ann piece. My tastes tend to run to pop, country, folk tunes, and mellower stuff.
Sophia Another piece I really enjoyed playing (and still do) is Mary Ann, I believe that you already had that one. But then again I enjoy calypso type music and it has a very cute left hand melody
I liked Mary Ann also. I didn't know what calypso music was until I just now looked it up. I'll be checking more into it later. Thanks for mentioning it.
Sophia Mind you, page turning is a skill we need to learn at some point... in fact I may need to face it soon with my current piece (I just started Moonlight Sonata which is two double pages long, yikes).
I'm going to kick that "some point" down the road as long as I can. 
Good luck with your multi-page turnings.
Animisha Congratulations with your first recording!
Thank you! It wasn't so much the tempo itself, it was the realization that the tempo I thought I was playing and the tempo I heard on the recording were noticeably different. Otherwise, I agree with you about getting faster eventually, so right now I am not that concerned with tempo speed.
At this point I'm only learning the chords as they're presented in the lesson book. So far that' be 3 chords, I think. No scales yet. I don't see much point in learning more than I'm using since I don't tend to remember things unless I use them on a regular basis.
I appreciate the different perspectives. I just piece together different people's advice that I think will work for my goals and way of learning.
You probably already know at least 1 scale... C Major. C,D,E,F,G,A,B,C. All white keys. That's where everyone begins when they start learning.
There are things that go along with each scale you need to learn too. For beginners those are:
Chords
Chord inversions
Key signatures. (For C Major there is no Key Signature. The staff is blank with no sharps or flats at the beginning next to the Clef. All other keys have some combination of sharps or flats at the beginning of the score. The self study books do a very good job of not telling you that stuff.)
As you progress you get to learn new terms and other stuff like relative minors, but that's for later so don't worry about them now. Concentrate on your lessons and ask questions about stuff you don't understand clearly.
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Kaydia I will do my best to learn and memorize them, but not so much on the speak/define/explain part since I've never been good at doing that.
Test yourself.
Make flashcards of chords and scales. (The card should just say "C Major scale" and nothing else. No explanation or description.) Place the cards face down and pick one card at random when you're getting ready to practice. Speak it. Play it. Verify if necessary that you did it correctly.
Do this at the beginning of your practice session for the day.
Otherwise it's difficult to test yourself when you're in a room by yourself so you have to find a way to give yourself a self test where you don't think of the answer first then ask yourself the question. Flash cards are good for that.
Thank you Player1 for the suggestion. I agree flashcards are a great tool. I have already been using the sightreading.training website now and again to help with note identification. The site does have flashcards for chords, but I haven't used that feature yet. I'll probably make use of it to help reinforce the chords that I've already been presented with in my method books. But not until after I've nailed down reading notes better. I can only learn/retain so much information at a time.