OMG!!!! WOW help me out here

Okay i just checked out WOW for the first time and it looks totally awesome, FUCK D2, WOW sounds too good to not play, i just want to know WHEN CAN I PLAY? and when they say 1000's of players online do the mean that you can play with 1000's all in the same game or what? im just exited and confused and and I REALLY want to play. does anyone know what the benefits of different classes (if any) are? eg a human paladin and a dwarf paladin what would be the difference, 1000's of skills too OMG so many possibilities, I feel like im on crack here, someone help me out, with any info please, Thanx.

1.) Not until Open Beta. That should be in the next few weeks.
2.) Yes, all 1000+ people are in the same "game".
3.) Read on the benefits, we're not a search and answer service.
4.) No problem.