Hi Sophia
Firstly, well done.
My first reaction when you started playing was - this is slow. I think you'd find the LH easier if you played it all a bit faster. At that tempo it's quite difficult to keep the LH consistent. No doubt that is the tempo advised in the lesson, but if your RH can cope then I think speeding up a bit will help you. That LH pattern can be played and used at virtually any tempo with a variety of rhythmic subtleties.
Are you using music there, or playing from memory?
When I learnt to play the blues many decades ago as soon as I could I started trying to improvise around the blues scale, and that's what I'd advise you to start doing asap. If you know that blues scale in C (C Eb F F# G Bb C) and can keep the LH going start experimenting. What you don't want to do, is make all this effort, working through these exercises (written by someone far more talented than me I'm sure) and at the end of it only be able to play the exercises. That's a complete waste of time IMHO. I'm sure the improvisation aspect will appear in the course you're doing anyway, but if it isn't, that would be a big red flag for me.
The main thing is that you're enjoying it, having fun, and clearly making progress.
Cheers
Simon
All round average Jazz, Blues & Rock player.
Currently working towards ABRSM grade 8.