When it comes to this type of things there are two camps or scenarios:

1. You give yourself a label and define it through your actions. “I’m Emo, because I said so”. This is how many subcultures name themselves, social groups of the same interest give themselves a descriptor and run with it. Usually around a shared taste in music genre.

A. You do you spontaneously, then other people give you a label to describe you. Then groups usually adopt the name and run with it. A lot of labels come from this scenario as well.

The point is that both scenarios also interact and dialogue. Some people redefine the label through their actions, usually from terms that started as derogatory insults and are then appropriated by the in group then redefined as an identity. Sometimes self chosen labels are then reinterpreted by the public and resignified by the out group.

It’s all very fluid and always changing. Don’t fret too much over it. Whatever label you define yourself or get assigned to today might as well mean nothing in a couple of years because culture is alive and constantly moving.