Cool concept choice, and nice start! This thing that immediately stands out to me is that you are trying to make the face shape in a straight on view based on the concept where the head is tilted up. This is skewing the proportions of your chin and lower lip quite a bit. The chin/jaw should be a little longer and the lower…
I feel like the proportions are off across the model. I think they are too thin. She seems like a more solid stylized body rather than a super model stylized. You have the front profile of the face pretty good. The chin however is too pointy. The highlights in the art show softer curves.