I haven't either besides my family... I guess you just kinda have to guess: do you think if you met the right non-binary or genderfluid person there would be a chance that you could like them? Or maybe if they liked you you could give them a chance? This was also a challange for me, because now I am Bisexual and non binary. Allthough i mostly like girls. I'm not really "attracted to" boys or demiboy and stuff like that but i would still give them a chance. So yeah I eventually decided i am bisexual. So yeah, if you don't really know just think about what you might do.