Quite like this edit if a bit OTT ?
If I was you I would put this whole shoot down to a learning experience, and hence hasn't been wasted.
None of these images I would consider usable, let alone use in a portfolio.
The crappy light has already been mentioned, so the first step if on a budget would be to get something like 3x YN-460ii's and a YN-560 along with some RF-602's to trigger them as well.
The above inexpensive setup will allow you to pull off a quality professional look if you know how to use them, seriously the only time using ISO 800 is acceptable is if your shooting a wedding or something.
Your shutter speed is also unacceptable outside of a wedding scenario and will cause blurring and softness. You should be using shutter speeds over 1/125 sec.
My next piece of advice is the subject is far too close to the background hence you can clearly see the ugly shadows, creases and texture of the background. If you are seriously short for space and you literally have don't have the room for the subject to be more than a couple of meters from the background, then you want to be shooting wide open the throw the background out of focus, so that means Apertures of F2.8, F2 etc not F5.
If you take it outside, your still going to need a flash or a reflector/diffuser, preferably flash as it's usually a preferred look in fashion to under expose the background a stop and expose the subject correctly with flash to add emphasis on the subject.
What ever you do make sure the the is not sitting on the camera and is instead on a stand somewhere.
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Oh and those cut outs look tacky.