Also from my own experience, public visibility and education matters so much. Growing up in Hungary, I only knew that trans people "lived as the other gender", but I never heard about HRT or even surgeries (aside from tabloid coverage of MtF bottom surgery 🙄). I knew that the way my body looked, I would never be seen as anything else than female, so I didn't even acknowledge to myself that I would be much happier as a guy. It just wasn't a possibility, so being a practical person, I never really considered the idea.

I was in my early twenties by the time I randomly heard of the existence FtM top surgery and HRT, and in a moment my world turned upside down. I still spent like a month with tons of introspection and educating myself, but when I was sure of myself, I started my my transition and never regretted it.