Sleepy online Class

I don't draw/paint whole pieces (character, BG, colours). But I downloaded this app on my phone (Infinite Painter) and I loved it so I decided to make this an opportunity to experience drawing more than just one colour pen realism
I don't understand colours and this is one of the few BG I ever drew and I did not go look for references bc I'm lazy, so don't judge too hard, I like how it turned out.
I also did this with my finger and didn't bother to clean it up, I like the sketchy look tbh I'm bad at cleaning drawings