In my opinion, the best way to get started is to get the general feel of the bike, because it helps you learn the more advanced tricks. Then, once you have that down, you should try to practice balancing on two wheels static. This vid helped me when i was starting out, Trackstanding.
Rocking. http://www.youtube.com/watch?v=KlU5xV7bKSQ...feature=related Hope, I've helped. Dan.