I'd give the idea an 89, and the execution a 72. Rough values, tough grading. The lack of the hand at the bottom is the biggest missing element, but the idea is very solid.
Less empty top space above her; SHOW the hand holding the stick/handle; show maybe one eye all the way; make sure there is good light on her, and sufficient depth of field to get the heart, and her face in good focus; color-coordinate her shirt with the heart and background.
This is interesting, so you have that! I think it would be nice if you had more of a variety of shades, it seems a bit flat to me but I think you will get better and you've hit the ground running.