Read.The.Live.Letter.
Edit: Including quote from letter so I don't feel like a jerk.
I'm not saying it's perfect, but this basic knolage and the mentor system should teach jobs perfectly.The Hall of the Novice
Players will be able to train in two ways: training for each role and training which doesn’t involve roles. Training unrelated to roles, such as dodging area of effect attacks, will be available right before entering Sastasha. After this, players will be able to start training for each role which has about seven tasks each. By completing all the training, players will be awarded with level 15 equipment. There will be a specific building for this, and inside you’ll find books which will explain terms such as “DoTs”.