Yeah proportions are a bit out of wack, hands should be a little bigger. Head seems a little too big compared to the rest of the body and she has no cleavage even though she should (the little line you see when girls have a chest. Even a little line like a Y would help)No collar bone, Lack of any type of muscle structure too. Her necks also a tad on the thick side.
As for shading, when coloring black its easier to use a lighter shade of 'black' and just do shadows for the shading, black hair with white or light gray highlights just looks overly gel'd to me. If you need to look at proportions and how forshotening could affect it, you could check out my latest stuff:
Lil-desa
I just uploaded about 8 different things from my portfolio folder.