Crafting?

[Conradus]

I believe you get access to them shortly after Lord of the Inferno (level 20 story quest) or something? It's around there.

The main scenario quest immediately after beating story-mode Ifrit in Lord of the Inferno starts your induction into a Grand Company. This all happens at level 20, yes. It actually takes three quests to complete your induction. You'll get offered GC membership in A Hero in the Making, you'll choose which GC you want to join by choosing the appropriate Company You Keep quest (and then be required to do an instanced fight), and then you get a third quest finalizing your induction (Wood's Will Be Done, Till Sea Swallows All or For Coin and Country, depending on which GC you chose).