I started working on interiors in Revit also. I ran into several little things as I worked through my first attempts. Some key points

1. Don't just render a high quality image right away. Takes time and you don't have any idea of your lighting. I start with a quick draft to check lighting.
2. If doing a render with sun and artificial light, you may need to tweak the light out put of interior lights or adjust render exposure. I also found changing the sun angle from 35 deg to 70 deg.
3. Play with your materials, you can adjust settings for all materials, you are not stuck with out of the box materials.