Camera Collision for Rolling Ball

Hi, I'm a completely new to Unity and programming. I was following the Roll A Ball tutorial and now have a script for movement by adding a force, and a mouse look script for the camera.

I have spent some time looking for the simplest way to stop the camera clipping through objects, like using raycasts. However I have found this quite hard to understand and not sure if it would work as the ball is constantly rotating.

If anyone could help me out or point me in the right direction to figure it out then I'd be very very grateful.

Thanks A lot