This is not a bad shot Julia but a couple of issues for me as follows…
1. Your focal point appears to be her near shoulder. This has left the face a little soft. Your focal point should be and needs to be your models nearest eye IMO. Nice catchlights in the eyes though!.
2. Your aperture needs to be wider to blur the straggling hairs .
3. The image feels a little flat. maybe a slight contrast boost or use of a reflector would help.
4. Composition. I like the slouching shoulders it gives an air of vulnerability to the model which compliment’s her angelic look BUT I suspect the slouching shoulders wont be to everyones taste.
All in all not a bad shot, nice model but needs a tweak or two to finetune IMO