Starting Forgotten Sanctum early? I’m going through my first run of the PoE2, and just got the earthquake that unlocks Forgotten Sanctum. 

Should I wait for the endgame to do it, when an NPC shows up to recruit me? Will I miss out on any story beats? Or will I be okay if I show up to investigate the earthquake?

Also, I’m not sure what level I’m supposed to be for FS—is it meant to be a level 18-20 challenge, or can a level 14 character take it on?