In the early seventies a bunch of us hippies were renting the basement of a large house converted into flats.
We became quite friendly with two transsexuals, (as they were known then) in an upper flat, probably because we were all living unconventional lives and the neighbours were uncomfortable with all of us, so we hung together.
I didn't have words for it, but it was clear that these two people were very different.
One could possibly have "passed" and desperately wanted to, didn't want to stand out, dressed very conventionally, had chosen a very normal female name and wouldn't have had any contact with people like us, or lived in such a ramshackle house, if things had been different.
The other was large, loud and dressed in things like fishnet tights, feather boas, frills and so on. This person's chosen names (and there were four of them) were extravagant and showy, there were frequent references to their anatomy and sex life, and always something to create a scene about. It always seemed unreal, somehow. Nowadays I would say performative.
So my first meeting with trans identifying men allowed me to see what someone with gender dysphoria looked like and acted like. This person told me that, at five years old, when asked what they wanted to be when they were grown up, answered "a lady".
I always had the impression that this person was horribly embarrassed by the other, and wouldn't have been their friend, if they had been more accepted by the community generally.
It also allowed me to see what autogynephilia looked like, even if the concept hadn't been identified yet.
Years later, discussions on this bit of Mumsnet reminded me of these two people and finally gave me the concepts and vocabulary I lacked, as well as awakening me.