First of all, private servers are terrible. If you're going to get into the game at all, actually buy it. No point in doing crack laced with rat piss and possibly crystal meth when you could be doing pure, refined cocaine.
As far as a first character, a Hunter probably makes the best choice. It's relatively easy to play at early levels, you get a pet to help you kill things, and you also get CC early on, which can help you learn how to be a better team player.
Also, just got my 3rd 85, my druid (who is now Feral Tank MS). Feral Tanking is so much fun now that it's not "lolswipelol". After I get her geared up I'm gonna probably level my lock or DK next.