First off, thank you for liking my artwork! *U*
Secondly…I colour fabric and skin rather similarly…which I’m actually trying/hoping to change because I too often neglect paying attention to different textures and such blahblah. 

Anyway I don’t have many tips, or at-least, know how to explain them…So I included a step-by-step that might give some insight on how I do things.
The blue image shows how I keep shading as a pattern? Whenever there is a protruding mound (nomatter how small or big ;D keke) of skin or fabric I shade from a constant light-dark-light-dark. I don’t necessarily think this is ever accurate, but I do like how it looks by the end. :’) Keep in mind protruding bits should be lighter and the indented bits should be more dark, it adds depth!
Have fun, and thanks again!

Firstly, thank you both! These are the books I currently own and have learnt the most from. (I truly suggest ANYTHING by Burne Hogarth.) I still don’t understand TONS about kinesiology but I think it’s helped me in overall how the body moves, looks, & operates. (Visit your public library nowww~)Honestly, this is a total cliche but practice, practice, practice! It was the only advice I ever got and it was the only advice I ever follow myself lol. Butttt jeeze I still got a long way to go myself ya know! Good luck and thanks again.

Firstly, thank you both! These are the books I currently own and have learnt the most from. (I truly suggest ANYTHING by Burne Hogarth.) I still don’t understand TONS about kinesiology but I think it’s helped me in overall how the body moves, looks, & operates. (Visit your public library nowww~)

Honestly, this is a total cliche but practice, practice, practice! It was the only advice I ever got and it was the only advice I ever follow myself lol.
Butttt jeeze I still got a long way to go myself ya know! Good luck and thanks again.