How old were you when you knew? What was that like for you?
Being bi: For sure? I was 18.
It had occurred to me that I was different in that regard about midway into my teens.
It was no great revelation, just a bit of an opening up of my options and a realization of attractions.
Being non-binary? Probably about a year ago or so. I’ve more or less been a tomboy forever. It didn’t occur to me that this was “abnormal” until middle school, so I quickly feminized when I decided I wanted to attract guys, because that was the only acceptable look.
But when I went back to college, I reverted to what was comfortable to me: teeshirts, hoodies, and jeans. The tomboy thing. But over time, I learned how to adjust my clothing to account for my sensory processing issues, but with the bits of femininity I liked.
I had some feelings of gender dysphoria early on, I suspect, but didn’t have the language to describe my in-between state.