Well, prepare for a wall of text because;
In terms of my identity, I was 14 when I realized it...Let's say I had said some dumb stuff in the past, that truth was that it was just internal LGBTQphobia.
When I was 14-ish years old I first came out to friends as queer/questioning, then as bi to them (later my my), a year later I realized I was non-binary, cause eh screw gender tbh. But only came out later on when I was 17 (I was graduating from high school and staring college, which was back in 2021). While I was studying Music and Sound Production, I realized maybe I was demi-sexual as well but probably omni as well, 2022, was the near end of the course, and...I learnt more and more about different identities, later really understanding my own gender (which is librafluid, think of genderfluid but with libragenders like Libramasculine. Let's just say i flux to libramasculine and non-binary because that's the form of librafluid my gender is), The mid of 2021, I realized maybe I'm lesbioromantic, and aroace but...the aroace part is just when I'm libramasculine, so somedays; Neither man or woman, other days no gender just being slightly masculine (even though I am AFAB, Assigned female at birth for short), it's only till the beggining of 2023 I realized I'm also ace (Asexual). I'm still kinda questioning my own gender...But...I've came a long way.
I only came out to my mum twice, sometimes needing to remind her about the non-binary part because it's just complicated and it's even more complicated to explain in my native language since a lot of things are gendered (I mean, it's a Slavic language, of course we have names for some things that English doesn't and gender things and have gendered words for occupations and that.)
I haven't told my dad since he's...eh. I've always had a bad relationship with him even as a kid.
(And yes, I'm almost 20. Turning 20 in August-)