Haha welcome to the world of online critique! Hope you have thick skin and realize that ultimately it's all about expressing yourself through images, not following rules or seeking mass approval. It's great to get tips from people, but eventually, you have to follow your own intuition.
Thankfully, it seems like you do have some, since for a first go, these are pretty good, and I can see that you're experimenting with framing! I agree with most of what's been said about composition, except that the first image, with her looking out of the frame, could still work in general. It's all about intent. Someone said it looked awkward. Awkward is a feeling you can manipulate. You can make things awkward on purpose, although I don't think you intended it in this case. Actually, what makes it seem uncomfortable to me is more the tension in her shoulders.
I'm also not a huge fan of the processing. I think it is a bit overcooked, I would've gone for a softer look, using curves and selective dodging and burning using a soft, low-opacity brush on a soft light layer. The background is also quite busy in the tree shots.
The great thing is that you have a beautiful and willing model (and the camera's not bad). Good luck!