if you’re going for image quality, you want a very low iso like 640 or less or you’ll have a lot of grain. Also, you probably need more light. You can reflect more light in there with bounce boards if you don’t have a lighting kit.
even if you remove the grain with neatvideo or ae’s remove grain, the low light will probably leave a pretty flat image. A good effect would be Ae’s exposure effect to counter this and individual levels to push the whites and blacks into a usual image. You’ll also need moving masks to lighten skin. It needs more light than white walls or looks very dull. Don’t use auto contrast!
Anytime you use auto w/b, the camera has to hunt for the right color, or if auto iso, the grain changes size. Full manual is the only safe bet. Make the iso as low as possible, then add more natural light.
If you have low light problems, the last thing you want is a super flat picture style. It will suck in even more flatness into your image because it requires more color/luma information. Still though, keep pre-sharpness down.