Thank you very much for your quick and complete reply, Enkidoh!

Then, may I ask something else?

If I change class, My character will be level one again and also the stats will be the same of that level? Because... It seems really exciting, so if someday I'm bored of a certain map or zone I can return back to the lower ones with another class. It would be like trying to be level 50 many times with different ways of gaming, without even making a different character, that's awesome.

Aside of that, is there any difference between the main class and the others? (Do I have a special different skill or more stats being Arcanist because was the one I started with, than for example others that didn't start with it?)

Thanks in advance.