Well good luck on the rotary challenge. It's really not that hard to use, you just have to practice with it, a lot. I started out with the rotary years ago and practiced on my own and haven't burned any paint yet. I also have a 3401 but really never used it since I prefer the rotary more than anything. It's just so much fun!
Sometimes I laugh when people come around all wide eyed and say to me I hope you know what your doing!!
Here is a little guide that you may check out on before you take the rotary for a spin.