i am a total amateur myself, but if I were to improve this, I would shade the wrist somehow. My eye goes to light and the wrist is not what I would want to emphasize. Otherwise it captures the charm and innocence of youth. You have a good model.
Truely stunning portrait, Erin. I love the way you captured the girl, the sincerity in her eyes and the beautiful colors surrounding her. Straight to my favorites.