As far as using non conventional pronouns irl, you probably haven’t heard it since it is genuinely dangerous to be outed in a lot of places.
This is usually true enough for rule of thumb, but can vary wildly by geography. I would be willing to help smuggle a gender minority out of a rural zone, whereas I wouldn’t be too surprised to hear “ze/zim” in some cities. In general, the GSRM community will appreciate a cis ally signaling ally-ship. OP, as long as it’s safe for you, the community would appreciate your announcing pronouns; it signals that you are not a totally garbage human.