If you are new to buffing and are concerned about burning the paint then I would suggest you to get an orbital buffer instead. Some say using a rotary is challenging but I always thought it was easy. Never used a orbital before.
I started learning on a rotary when I was apprenticing and thats all I used at the dealership. I never though it was hard at all when I first started. The only thing about a rotary is you always have to keep it moving and stay away from the edges if you dont know how to tackle them.