You gotta rehire all your retainers from any character that had them.
Take all your items out of the Calamity Salvager.
Accept the first quest(s)... just to be safe, follow the intro quests till it asks you to atune to the Aetheryte.
Shouldn't be in a FC or have signed a petition for one.

Umm... can't remember any other "tricky" details.