Great work, love the motion (flying hair, blurred background) ;the expression and bowstring in fist (intent hopefully, after-all a full-draw long-bow style does imply something) one's self found in her field of fire could hold hope of avoiding a unwanted piercing. Going on this mental flight at a glance of your work was a joy WELL DONE.
The artwork is very good, but I'm afraid I have to contribute to those criticizing the posture. As mentioned, the arrow is on the wrong side of the bow. The fingers drawing the string should be pulled back to the corner of her mouth. Doesn't have to be exact, but ain't nobody drawing back to their chest. Most archers use two fingers to draw back the bowstring, some use three. Never seen four.