All kinds of questions..

[Aidalyn]

So am I able to switch to Gladiator or Conjurer at this point? And if so, how do I do this? In my starting area I didn't see any kind of a Gladiator guild hall.

thanks

Continue with the main storyline quests in Limsa Lominsa, and around lvl 15 or so you'll eventually unlock your own airship pass. This will allow you to access the Gladiator's guild in Ul'dah and the Conjurer's guild in Gridania.