I think you have her general face shape down pretty well. Just my opinion, of course, but her outside lower lid needs to be raised a little and maybe narrow her eyes a little by using the eye width slider from awt.
Her nose appears to be a little rounder on the tip and her nostrils could probably be fixed with the nostril rotation slider.
Her lower lip looks almost perfect, but her upper lip is a little thin and maybe needs to be just a tad fuller.
I think you're off to a great start, so don't give up. You can do it.
This is the picture that I was using. Not sure if it will help you, but here it is.