Hi, new player here, Im also new at MMOs.
Im a bit slow at learning but eventually things just work out, however Im bit over 100h playtime now, and still have some issues I couldnt figure out on my own.

1. Got a new hairstyle item at goldsaucer but I cant use it? Is there a specific way to actually unlock the style? Any other tips on aesthetician stuff?

2. Ive started breeding race chocobos even tho I dont quite get how to do it effectively, so any help on that? What I should know and what not to do? Is there a good thread anywhere of this subject?

3. Loot cast thing in dungeons, what, how?? I get the difference between need and greed but thats it..

4. Retainers, when/how can I hire more? Ive got 2 right now, I havent completed main quest line yet. Also you can send them to gather stuff or something?

5. Is there items/equipment I SHOULD NOT sell/discard/trade if I happened to get one?

Thanks in advance to anyone who would take time in answering