1st image: I would have stayed away from the blotchy light, it lit up the leg and part of the face.
Not sure if you could have pulled her away from the background a little to avoid the shadow behind her.
2nd: Hard to imagine this dress out in the grass, may have worked where you were on the 1st shot a bit better.
3rd: Tones are cool, just watch your cropping at joints. Makes em look like they are amputated. Looks like flash was from the camera move it off camera to get that catchlight at 10 or 2 o'clock if possible. That or light her up with a reflector, most of these models bring a friend put them to work.

4th: If you don't have the lens to throw the background out of focus to bring attention to the subject,
move her away from there. Look at the gear you got and the settings used and think of what you could
have done to throw the background out of focus.
5th: I like the shot.
6th: Since the post is white , try a black border around the image to bring it out.
The exposure compensation thing should not be an issue if you shot in RAW, just move the slider over
believe it gives you a 2 stop adjustment to start with.
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Cool shots, thanks for sharing and shoot well, Joe