Open the V-Ray Asset Editor (the green diamond icon).

V-Ray is built for realism. Delete the default C4D camera and add a V-Ray Physical Camera.

You have the software. Now, what do you actually do? Forget the complex settings for now. Follow this beginner workflow:

When you install V-Ray for C4D, you are getting five major tools:

Chaos releases 1-hour "Master Your V-Ray" sessions. Search: ChaosTV + Cinema 4D.

Delete the default C4D material. Create a VRayMtl.