Welcome to Candyland, @Nightowl
Oh yes - this sounds blue, all the blue chords, and the blue notes (Eb is the "blue note", but don't ask me, why. Maybe because Eb to E bending on saxophones is used so often - we pianists slide) - this makes the soul and the spirit of a Blues. It is strange, Blues sounds so different to everything classical or contemporary - even if we press the same 12 black and white keys over and over again. Yours sounded like such a Blues.
I would say, this is a successful premiere for you in this hatred genre. Well played! Even with quite much of confidence - despite the red-button syndrome. (My last recording took me an entire day, probably I did most of my practicing work during my recording attempts.... But officially, I blame the red button syndrome.)
You said, you didn't spend too much time at this Blues, which is even more impressive. Told you, Blues is the easiest genre - except of Nursery songs, maybe.
This piece doesn't sound very difficult to my ears, especially the LH has little chord changes, freeing your attention to be focused on RH melody. If you want, you can try out Christians very first lesson of his Blues Piano for Beginners playlist. (No sheet music required for the first lessons) Compared to your piece, his RH is stupid easy, but his LH is beefed up because you have to change the chord every 2nd note. Sophia called the LH pattern as Humptee-dumptee, and I kinda agree because this is repeated so often until you dream of it. But it is a very good exercise for hand independence. I remember when I did the lesson - I was so proud after I mastered it. I felt like being John Lee Hooker.