Relight and render my C4D project

I have a Cinema 4D files with textures added cameras and lighting but the renders don't look that professional, I would like to have the file "fixed up" by someone by redoing the lighting, setting shadows, and adjusting the render settings. Render out the results and send the file back. So I can update the file myself and learn how to light an interior office showroom. 140m2 showroom 20cameras 90mb file