I've been getting back into art, and I'm trying to learn how to draw a character consistently from different angles. So I've been trying to draw my friend in a comic-book-ish style. I feel like it's a bit off, probably the lighting; I'm not good at drawing those shadows. Any tips on making this better to look at while keeping it simple? | Artwod Feedback

I've been getting back into art, and I'm trying to learn how to draw a character consistently from different angles. So I've been trying to draw my friend in a comic-book-ish style. I feel like it's a bit off, probably the lighting; I'm not good at drawing those shadows. Any tips on making this better to look at while keeping it simple? | Artwod Feedback