WoW newbie looking for advice

[Bun-Bun]

Druids are probably a nice choice to start out with, but playing one late-game effectively (though this goes for nearly every class) can be moderately complex, especially in PvP. I would not recommend a Warrior, Druid, or Paladin as a first class unless you enjoy tanking; you'll be expected to tank for instance groups in most cases because there are very few occasions where there are many tank-specced tanks available for an instance.

Conversely, having a tank-type (druid/warrior/paladin) or a healer-type (priest/druid/shaman/paladin) means you'll never lack for friends when you want an instance group. It's essential to have one of each for any instance group, and the mass of players in the game just wanna do damage. There's always a shortage of tanks and healers.

If you do go druid, I second Monkey's recommendation to get Itemrack. I couldn't live without it.