Great contact with the viewer and you've picked up good catchlights in her eyes.
Overall, it feels like its trying to be low key, but somehow comes across as a bit muddy, or lacking in contrast where it really matters. The hair to her nose is a bit compositionally distracting, the way it merges.
Wonderful expression. Good details and focus from what I can see. I really wish this was brighter as it seems to be substantially underexposed. Best of luck to you in the challenge.