I think my critical error was in making it circular like a pin instead of rectangular like a flag, because though a lot of people noticed it, they all said "Hey I like your Easter Egg"
But it still gave me an in and I managed to tell all of them nah, it's the trans pride flag, I'm transgender.
I came out to like... half a dozen people, aside from the ones who already knew? Including the DM of my 5th edition D&D game, which is good progress I think?