Do I have to wait until I turn level 50 to get one of the cool armour sets or can I get one upon reaching level 30 and selecting my job?

I'm 2.5 levels away from obtaining Black Mage and all I see is just a continuation of the same cowls and coats I've been wearing since level 1.
I'm currently:
20 Arcanist
27 Thaumaturge
15 Archer
9 Weaver

After this much work, I'm bummed to still look like I did when I started my adventuring career.