WOW! playing with forms and shades is very lovely. Skin colours are top notch imho.Even the background is ultra cool.
As I know through my head studies now- ear is much too high

Lower lip could be a bit backward, mouth a bit higher between nose and chin but that is more about taste. Ear not.
Left hand could need a bit shadow to rest better on ground.
Probably some fine idea of ribs would make the torso look stronger.
Overall I wish, I would be already on your anatomy stage!
If that is done with reference, it is stunning. Without it blows me away!
Congrats!