Lily Cole with White Hair

Hey, nice job

I like your anatomy, which is generally quite good. The only thing I would change is detail on the iris and some more structure on the exposed shoulder, perhaps a collarbone. You've made a good attempt at the hair, but I wouldn't make the lines in her hair so dark.
If you can add more detail to her cheeks, and make her cheek bones more obvious this can go a long way in general face structure. This can be achieved by shading the area underneath her cheek bones.

If you want to play around with shading I can recommend doing so near her tear ducts, to make her eyes look slightly more down sloped (which eyes often are slightly) .

Some of the coloring is a bit strokey, but that is just a matter of time and experience.

Congratulations, I look forward to seeing more of your art in the future.