Since you ask, you need to get the subject posed better. They are hunched forward, make sure they sit up straight with the head and center of the body in line. You should be able to see the subjects hands. In this shot I would have got her to put her left hand on the rock behind her so she has to straighten up and open her body a little towards the camera. Tell her she looks nice, she does, complements go a long way when photographing people. The minute you tell the person that they look really great when you're taking a photo they relax and feel more confident and you get a better photo.
Posing people feels weird at first, an easy way to approch it is to take a photo show them the photo and tell them what to do to make it better. In this situation you would show her this photo then tell her she's leaning forwards and ask her to sit so she's straight, take another photo show her that one and ask her to move her hands etc. Work with the subject to get a better photo, if they can see what you're doing makes the photo better they're happy for you to keep taking more photos
Don't shoot from above the subject, always shoot from around their waist line height or lower. In this shot if you'd layed on the ground you'd have got a much better shot. You want to avoid having the horizon line running through their head. If you'd shot from the ground then the building would be lower in the shot and her head would be nice and clear with just some trees behind it.
Have fun, if you want to practice just go out and take photos of strangers. Just pick random people, tell them you're a photography student and you're taking photos of people for a school project, give them a compliment on something, nice clothes, great haircut etc etc anything really and ask them if it's alright if you take take their photo. Do the take photo show them and get them to stand differently thing. You'll become a much better photographer really fast doing this and it's super fun. People love having their photo taken if you make them feel special.