>>530842636
>I assume there's no way to actually swap classes and keep the level right?
No each Job has it's own level but Expansion jobs start at higher levels by default.

> I'll need to get to 60 before I can start trying them out
You'll need 60 to unlock Dancer, but you can unlock Samurai and Red Mage once you reach 50

https://ffxiv.consolegameswiki.com/wiki/Job

Also skills and animations upgrade with levels so Black Mage might suck now but feel better at higher levels.
Still, world is your oyster just try shit.