Improve photo quality of this 6 year old. I want high quality

Improve photo quality of this 6 year old. I want high quality, expression of passivity. Preserves physiognomy, the person's hair and age. smooth skin, but with the texture of a young person's skin. Keep the point of view. Preserve the girl's angle. Make the same crop as the original photo. do not cut off the head. Don't put freckles. Don't make someone else. Please preserve the physiognomy and easy expression of . Keep the haircut as it is in the original photo, but enrich the details and definition of the hairs. I want a natural result like a professional photo.