I feel super nooby asking this...but how the hell do I meet up with a friend who starts in a different "world" than me? We're both level 15 or lower.
What the other folks said. If you are in different starter zones too, find your way to the nearest city and use Asuran Gates to travel to the city closest to them. Then just meet them somewhere, any time, any level! Feel free to ask in guild chat and I'd be happy to help you out.