Question from an inexperienced player

[Mocita]

When you travel the cities just be sure to unlock all classes, both battle and craft. Even if you are not going to play them at least they are unlocked for later in case you need to or decide you want to try it out. It doesn't hurt anything and just increases the number of gear sets you can have

And completely congest your Armoury if they aren't sharing gear. But Anima is right. Just unlock everything, even if you're not going to use them