The model looks very well done, nice and clean, good canopy work.
I do think your back drop is too dark, it may work better to have a lighter blue with a little refectivity to help even out the light. Being further away from the subject and using a longer lens helps to avoid distortion.
I have a lot of fun photographing my models. I used to like natural light, but now I use my workshop as a studio, mostly because natural light can be so variable and I have too many trees in my yard that create shadows. One thing I did was change all the workshop light bulbs to the same color temperature, 6000 Kelvin in my case but it may be more important to get the same temperature than any particular temperature. It helps digital cameras correctly set the white balance.