do research, and which ever one fits what you feel, then it could be that. usually the label does switch a couple times before you find the right sexuality though, but at the end of the day it is just a label reply
I think there is no definite best way to know your sexuality, you just need time to think about it. Maybe think of real life or fictional crushes you've have in the past, of what kind of porn or gender you would feel comfortable with, explore, etc. reply