Stop polishing sketches then! If your goal is to do good story telling, once you have a sketch you like, you need to work out if how you drew it is actually the best way to do it before you commit to a render. You are going to improve faster if you are more methodical and think about what you are doing rather than leaving…
Looks like you've got a decent start here, Wolthera is dead right, try periodically flipping the canvas, it'll help a ton. To me it looks like you're drawing what you think you see, rather than what is actually there. For example you've got a sharp highlight on the nose in your version, whereas the reference doesn't. Your…
Pfft, yeah. Sorry I threw so much at ya! In that case, get all the interesting aspects of her body in. Her face/expression certainly isn't going to tell the whole story by itself, so find some other way to add visual interest. :) I think there's still more you could do with her expression, but it explains why there's no…