I made a character on one world and then was told I can only have one character per world (is this a trial only thing?). After I made the character on the second world, I was in a new city, a new realm, and everything was different.

Is there a way I could travel with the first character to the world of my second character? Is each world a separate "planet" with no travel in between?

And finally, will I, once I buy this game, be able to make more than one character per world?