I already replied to you, but fine.
I learned about being nb from someone else who was nb (but in a different way) as I said. Nb people are different but share two important characteristics: we know we're not a binary gender, and people attack us for it.
Nb people don't have a hive mind. They are individuals who all describe themselves as nb. Not sure how that's difficult.
It fits me in ways I cannot explain. The only feeling that's come close was getting to know some close, long-lost family. When you know, you know.
In the same way that I knew my sister was my relative, without being told, I know who I am.
Helps that I have gay relatives who were told it was a phase, wrong, misguided or a choice. I've watched them have their 'motivations' and 'selfishness' - and their bodies - discussed by others. (I stood up for them, yes.) I saw how they were vilified. How they were dismissed as less than human, mentally ill and predatory.
I know that today's hostility to trans and nb people is a repeat of the homophobic panic of decades ago.
I know to accept and celebrate who I am. Once I've fully come to terms with it. And on this journey I have been endlessly supported by LGBTQIA+ people. It's been humbling. But also, completely nondescript and ordinary. Because it's a really small part of who I am.