It's an optional area, starts with the quest "The House that Death built"(In Gridania right inside the Adventures guild building a evil potato is sitting on a box of crates), don't forget Hunt log for you're class(each starting class from ARR has a set of entries), and well Class quests for the skillz... other then that, DF for MSQ/Leveling, or you can do Frontline if you have it unlocked(A Note on frontline, you can "que" as a class you want too lvl but go in as another class, the "que" class will get the EXP(And it's a shitload of EXP for how fast Frontline is, works same as the MSQ bonus also once a day))