Hi there! You're already showing good volume and proportion of the figure, as well as anatomical knowledge, but I think it would benefit from pushing the gesture further. The reference image has a pose that pushes her hips out and to the side while bringing the upper torso/shoulders further back, creating a really dynamic flow diagonally that would be great to focus on and even exaggerate. She also has the direction of the shoulders and the direction of the hips in opposing tilts, which is referred to a "contrapposto" pose, and has been a popular pose for artists throughout history (most famous in Greco-Roman sculpture) precisely because of the dynamic quality it creates, so I would definitely recommend pushing it as well :)