Hey! Welcome to the forums! I see you are up north next to me in the cold
I like the contrast of the orange on the blue background, and I really like the grunge looking background as well.
A couple of suggestions from me...
I agree with what oldmacman said with the cropping. It helps to have some room in the photo where the eyes are going. It felt a little close to her before. Your eye naturally follows where the eyes are going, and you want to leave some space in there for the viewers eye to travel.
It also looks a little over saturated to me. If I were to try a couple different posing options, I would tried her back flat against the wall, and then shoot directly in front of her...it looks like you are at a slight angle to her and the wall, and she's at a slight angle too and it doesn't really work in my opinion. You could also try having her lean like she is on the wall, and then you could also lean on the wall and get a nice shallow depth of field with the wall blurry in front of her and the background blurred behind her.
Also...I know I'm nitpicking, but you said don't go easy

....it feels a little awkward to me with her leaning on that black knob. I'm also not too crazy about the angle she's looking up...that feels a little awkward to me too. I would maybe try her looking at you, or looking off to the side a little bit, but that's my personal preference too.
I hope that helps! Keep shooting and posting pics!