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Welcome to FM, and best wishes as you continue to grow. I have two comments on posing and composition on your preferred images. First, all of these are cropped too tightly. Your subject needs some "room to breathe". I know that sometimes in our urge to obtain critically sharp focus, we tend to get in too tightly and not establish enough context for the portrait; that's what is probably going on here. So give her some more room. Second, the first and fourth images look like she's listening for something within the tree. Is the tree speaking to her? I doubt it. So try for a more natural pose, even if the tree is going to be in it.
Thanks for posting, and I hope these comments help you.