I like the pose and shading. The face might be a tad too dark. An easy fix is to copy and paste the layer, turn that layer into a screen layer, and erase the parts you don't want highlighted.
Make sure to direct the viewer to the face and hands at all times with contrasting colors, directional symbols, bright values, etc. Of course, try to keep it subtle.
Edit: Bounce light: light that is reflected from other surfaces. Highlight some parts of her left side with lighter colors found on the right - more lit up part of the drawing. If you don't over do this, the drawing will come up a tad more three dimensional.