/ic/ - Artwork/Critique

Couple of sketchbook pages pasted together, not sure how well it turned out so if it reads badly or is shitty in any way sry about that :I

Would really appreatiate any general advice/ where to go next.
Or How to approach light and value effectively (as in books, resources. What materials to use, I only ever used HB pencils)
Think that would be the next best step for me as it's the only fundamental that I haven't tackeld apart from composition and colour. Of which both won't give me much atm.
But tell me what you think I should do different/ start learning/ stop doing.