Hi! The idea is pretty cool! The color choice is good as well. For such lighting you need to work with very dark shadow, high contrast and string highlights. The problem is that her entire form has almost no shadow that is why it looks so flat. For face, same issue: you need to think in 3D. Head is a sphere. The features need to wrap around it. I would highly suggest checking out Artwod's portrait road - it teaches how to do it. Hope paintover helps a bit convey what I meant. Cheers!
Wow! I see it so clearly now... I think I got too caught up in the references I used. Thank you so much, this is exactly what I was looking for and I completely understand the problem now :)

