It's been brought to my attention that there are rookies of all levels. Recent columns have covered very basic topics such as instance play, group etiquette, and account security. Once you get to level 70, you'll have several options including solo play, PvP, and instance raiding. Raiding is a major part of the game, but can be somewhat overwhelming at first.
Raid instances vary from ten, twenty, twenty-five, and forty players. These instances are similar to five-person dungeons but require considerably more coordination. Ever player must work in concert to bring down challenging bosses, and they are typically rewarded with excellent gear for their efforts.