Getting misgendered sucks - having a pin (or pins!) to let people know your correct pronoun can help. Visibly sporting the pronoun(s) you use can be both useful and empowering. It discourages strangers from assuming, and avoids a lot of awkward non-conversations. Also, if someone misgenders you AND clearly sees the pin - good news! You now know they aren’t worth your time.
Whether you have happily used the same pronoun since you were born, or you like to switch them up day-to-day, I hope that you feel good about owning the hell out of whatever ones feel comfy right now.
Oh, and if none of them seem to fit? that's ok too. Here's to experimentation and breaking the rules.