This scene doesn't appear to be lit, or if it is, it is under lit. The models eyes and sockets are very dark. I would create a large soft light source on the left of the camera either with an extra large 6' x 8' soft box or an 8'x8' "Book light" using diffusion silk and two white foam core flats. Bounce an HMI (or high power LED fresnel) into the corner of the two 90 degree flats and diffuse the bounced light at the open end with the diffusion. Add a hard hair light behind the model opposite the key light just out of frame. To complete the job, hang large overhead white panels over the cars behind the model and bounce light into them from two HMI or high power LED fresnels that are on stands just out of the frame. I would also square up your center framing so it's perfect. Move the red car to the right, so it's rear is just to the edge of the frame and move the silver/white car to the right as well, until its rear is on the left edge of the frame. Even better would be to use a different color car that separates better from the background. I think using a higher camera angle and tilting down would fill out the frame better as well and crop out the skylight above her head. Work on filling the background with the two cars as much as you can. THEN bring in your model and move her till she fills the frame from the waist as you have her, but with less headroom from her head to the top of the frame. Adding some strip lights on the floor shooting up at the cars could add a nice touch too. But you'll have to be careful with reflections.
Good luck!