The red roses, the cool gray palette of the scene and the subject's clothing, and her graceful stride through the seen gives this piece a serene atmosphere, as if the subject herself enjoys bringing peace and joy to those she encounters. Awesome job!
There ARE left handed violinists. My violin teacher told me he saw one in a concert - that man has changed the whole violin for this, and he held the bow with his left hand (but I bet it costed A LOT).
However those people are really rare. Left handed people simple don't play the violin, mainly because violins are made for right handed people?
To address the anatomy being off; Well for one her whole torso structure seems skewed and a little thin? Then her right arm is off in fact it's not even possible to bend ones arm to that position while still holding their wrist at that angle while also supporting a violin. Imo the violin should be toward us more and her arm out in such a way to compensate that. Her neck/head attachment also seems off. And, slightly off topic here and addressed at the artist; but why does she have headphones on if shes playing what appears to be an acoustic violin?
Excellent and well colored, if I might suggest some color themes to you for your next work? Could you try an autumn scheme, I LOVE AUTUMN... its only a request, sorry if i annoy or offend you in anyway by asking it.