Critique my drawing skills, Southperry

EDIT: Does anyone know how to make the image sizes smaller? I just realized how huge they come up on here.

Hey guys, I have been drawing my girlfriend for Art 1 for about a week, and I'm almost done.
In Art 1, we have an incompetent teacher who hasn't taught us anything. This frustrates me because I have never taken an art class before and really want to learn how to do.. art stuff.
I showed this to the Honors Art teacher yesterday and she's been helping me on it.

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This was how it started and she's told me to change some things and it's come out like this so far:

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Here are my references. You can tell which one I used primarily.

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I've done a few other drawings in Art 1, but this is my first one where I have really tried to work on shading/dimensions. It's the first time I've used a tortilla (or w/e the rolled paper is).
So please tell me things I am doing right and wrong so I can improve.

Thanks so much for taking the time to help me out!