I am blindly running around doing the simple quests and have no idea how to interact with other human players.
I wouldn't worry about that, half the people playing mmo's today have no idea how to interact with other players either

If you're on the free trial you can't speak one to one with other players unfortunately (using /t to send a 'tell') but if you do buy the game start a character on Laurelin and I'll be happy to give you a hand (Telrian or Caldir in-game).
Typing /who followed by the character name will tell you if they're online.