Very lovely thank you for sharing. I love her face too she looks like a goddess. As for critique, I love the beautiful contrast and shading. Only the centre of the rib cage, the right shoulder, left wrist and throat apear a tiny bit unnatural to me. Only because the divet where the rip cage meets in the centre is not visible and the shadow on the shoulder appears too thick, to me. Also the wrist connects oddly to the hand in my view and the throat is too flat because it is naturally rounded. One thing I suggest is drawing the skeleton and muscles before you draw a person because it makes it look more realistic. If you study anatomy on your spare time you can apply it to your art and models. Best of luck and your work is beautiful still.