I think you need to work on your proportions the most, maybe try working on your images zoomed out, so you can view everything and how the body looks together. Your character tilts a bit to the left, making her look like she's falling backwards, so working in a more full-size screen will help you catch this while you're drawing. The proportions of the limbs aren't bad at all! They look about the right length to me, but the hands and feet are way too tiny and lack dimension. Try to work on how hands look and search up some tutorials (although if you ask me, it just takes years of repetition to really get it down and I still haven't myself) So don't let that discourage you. Nothing looks too off to me shading-wise, but don't be afraid to use dark colors and try to use colored shades instead of blacks and whites. Wouldn't hurt to look up a bit on clothing folds either, since you seem to shy away from them as well. :> Hope this helps!