Heres a series of seven Quick Start videos from Chaos Group for V-Ray Next for Sketchup. You can find all of these and more from the Chaos Group YouTube channel...
2. How to light an exterior day scene
3. How to light and exterior night scene
4. How to light an interior day scene
5. How to light an interior night scene
6. How to create and use materials
7. How to use V-Ray's volumetric effects
More V-Ray for Sketchup videos and tutorials can be found at https://www.youtube.com/c/ChaosGroupTV/search?query=sketchup.