looking for exp partyFollow

Typically at level 24~25 people head to Kazham for EXP. The below link should direct you to the quest that grants you access.

Airship pass for Kazham

Pretty much go to Giddeus, Palborough Mines, and Ghelspa and kill particular beastmen until you've collected a treasure chest key from each zone, then trade them to a guy in Port Jeuno.

After you've finished that, take the airship to Kazham and put your party flag up, you should get an invite in no time.

If you don't have help for getting the keys, stay in Qufim Island (Level Sync) until your 31 or so. Then you can take the run to Garlaige Citael.