I have some color problems with this image. I would like to add some more color variations on her skin but don't know how or what color would i add. I also have little problems with lighting/shading. I have one light source - window on left side.
Any help would be really appreciated!
As far as skin tones you're really lacking in the red department. Your warm and cool transitions are working out well enough. Look at figures more...
...because the anatomy is kind of wonky in this one. I know you're going for a crazy foreshortened perspective, but picture her arm at her side and where that would fall, for example.