This is a beautiful piece you have done! I adore your style
My only thing to critique here is that her elbows should fall around the same place as her belly button, so they are not far enough down here. And that the hand is a bit too small, it should be 3/4 the height of the head when flat so making it bigger would be perfect! :3 I would also say to go a bit darker with your hair shadows and don't be afraid to add more pure white highlights!
Great work hun! You have a lot of talent can't wait to see more from you