/ic/ - Artwork/Critique

Absolute stickman-tier beginner here. I always wanted to start drawing as a hobby, but never really put effort in it due to focusing on other stuff (and not having much focus in general because of ADHD). Last night I read the link in the sticky and tried to do the upside down Stravinsky drawing, while also ordering Drawing with the Right Side of the Brain on a whim. The book arrived earlier and I wanted to ask whether there's a suggested order for exercises or if I should just go in order from chapter one?

Sorry for the folded paper and the scratches, I didn't have any unused printer paper nor an eraser.