Would you like to come up and see my etchings?

[Lyraina]

Good to see a longer study! :) You might want to fill your background with a medium grey or some color though, it's a lot easier on the eyes (especially when you are working on it for a few hours) and also makes it easier to get the values right. Especially since your reference has a dark background in this case. As for critique for the image itself - I think her right leg is a bit too slim in comparison to the right one, even if it IS a bit slimmer. I think it misses a bit of muscle on her thigh as well as the inside of the lower leg (calf).
Keep it up & have a nice Christmas :)