I like it, I like the texture of the rock behind her head.
Maybe you can play around with your photo to get the background colour closer to her eyes, instead of the green. It might be cool, it might not? Or change her eye colour, because the moss/algae is cool?
Her eyes are smiling, if you do not want that effect, then have her open her mouth just a tiny bit, and relax her face muscles. It would make it darker.
Keep it up!