Tree of Savior Forum

Orsha "Main" Quest Start?

My Character is lvl 52 right now and i startet at Klaipeda.
I heard that i can do the Main quests from Orsha aswell, so i wanted to know where the quests starts or is it just the quests from the NPC’s (going from map to map without needing to do so through a quest)?
And is it true that i just can use my EXP Cards? Some say that i need them at lvl 150+ others say that i can just use them.