This picture could be great. experiment with cropping, i would remove the flowers the distract and are a bit burned. Lines are very important also, ask your model to press the shoulders down to avoid square shoulders, they don`t look great, also ask your model to look in the lens, not higher or lower. If you want to present something like the flowers she holds, avoid eye contact with the camera as we are always drawn by eyes.
A very good start with your portfolio, keep taking photos and eperiment as much as you can.
If you can shoot raw will save you very much time when processing.