If I shot this, 3 would have been the only one I'd do post-production on unless the client needed 6 images. 3 has the best composition, the lines on the wall point to your subject, and contrast seperation gives ok seperation between your subject and the background.
The lighting isn't so great on any of these. It's from the top, down, with little, to no fill light. 3 is better than the others becuase there's at least a background light, but with no fill light, the background is brighter than the subject which distracts from her. If you have someone who can be an assistant, use them! They can hold up fill cards/reflectors, if you have a speedlight and pocket wizards, use it them as a slave, take it off the camera, and set it off to the side to give lighting direction, and have a fill card on the other side for fill light, you can gauge the exposure of the background with your shutter speed while your flash is gauged by your aperture. If the light is too harsh, make a softbox for it, it's not hard, and it's dirt cheap, all you need is a cardborard box, duct tape, wax paper, and a razor blade.
It's good that you're trying this, and you should do it more, but you also need to work your lighting too.