Wonderful eyes, and obvious energy. I love that "ready to burst out laughing" moment that's caught here.
However, it looks as if you were rounding your right shoulder forward and in, which caused an unusual curve along the back of your rib cage, about level with your elbow. The photographer should have caught this. You might practice in front of a mirror (or better yet, in front of lots of different cameras) and critically evaluate how each position looks. The usual advice is to study lots of images, ads, etc. - and to think about what you see in those images.
You're a lovely young woman; hope to see more from you soon.
As another one interested in science, good luck with the studies - thanks for sharing.