This is the best I have. I can't afford courses but I would be happy to be able to draw decently enough to convey most ideas. Let's say like something you could

This is the best I have. I can't afford courses but I would be happy to be able to draw decently enough to convey most ideas. Let's say like something you could find here: https://press.princeton.edu/textbooks/illustrations/penrose https://press.princeton.edu/textbooks/illustrations/penrose