Yo~! New Aussie Gal here!

[Orophin]

Not to sound condescending, but it seems pretty bad if Lodestone or in-game tutorials haven't covered these topics yet, since they're all pretty much things a beginner should learn early in the game. :/

[Estellios]

Not to sound condescending, but it seems pretty bad if Lodestone or in-game tutorials haven't covered these topics yet, since they're all pretty much things a beginner should learn early in the game. :/

Guildleves are covered both on Lodestone and in-game, as long as you follow the advice of the adventurer's guild NPC (It's Momodi in Ul'dah, Baderon in Limsa, I don't know what the name is in Gridania). Lodestone covers class changing as well, but I don't think most people look at the Play Guide section and only use it to get to the forums.

Neither, as far as I know, cover linkshells but I don't think that's as necessary as the other two since most people don't make their own shells.