Hmmm... I think the outline on the skin could be a little bit lighter... it kinda stands out a weebit, compared to the hair and her shawl...
speaking of which, it looks like some shade could be done to said shawl, and maybe even on her shoulders? like, her left (our right), there's a strand of hair falling down, im guessing there'd be a little bit of shadow cast by it.
the top of her hair starts off looking soft, and then you get the same kind of harsh-y outline around the body of her hair, same as on her skin... makes it look kinda false, or cheaped out, y'get me?
lastly, i think the shading on the hand could be pushed a little more (after doing what the others have suggested; knuckles, hand placement, pinky, etc)... maybe even a "gloss" on her nails, lol?
hope to see this up in the gallery soon!