1. I really like the colours, but I think it should have been shot from a lower angle. To have the path leading off from beside her instead of above would have drawn more attention to the actual subject while still contributing to the image.
2. I would also have preferred her to be less centered. Given the expression and pose, to the left would make the most sense for me, almost as if she were saying 'bye!' with the tip of her hat and walking out of frame.
3. I love the expression, pose and composition, but she looks buried! I would like to have seen a little bit of a side angle to show her legs or something to make her look not so amputated.
I think that you have the right idea and a very good start! Try having your model hold their pose while you take a few shots from a few different angles until you get a hold of what really makes a photo more dynamic and thoughtful than the straight on that you're used to