It's anything that isnt casting and hitting people.
I think the thing to do is to decide what you would like to do, what you think you would enjoy and then we see if we can help you make it happen. I was advised to try and get a pure toon to lvl 20 before messing with multi class builds, which suited me. It kept things simple and I could focus more on learning the quests etc. Not sure how you feel on that.