I worried about all these things and all I was doing was coming out as gay. And I live in the UK, which has strong legal protection against discrimination on the basis of sexuality and gender, and a relatively accepting culture.
I can only imagine it was a thousand times worse to come out as trans. Or even to understand it in yourself - again, this took me years and I was "merely" discovering that I was gay.
https://www.researchgate.net/publication/262734734_An_Analys...
(This study also omits the large proportion of transgendered folks who never get reassignation surgery and instead opt for HRT, or even no treatment whatsoever.)
But you don't care about that, of course. This post is for the people you would otherwise offend and hurt out of some peculiarity.