I totally relate Waiting!
I have been quietly exploring all of this on my own for about 5 years now and recently joining Mumsnet has been part of that journey.
It started as an instinctive response of confusion and doubt, and that sense of fear about opening up the discussion, even with those closest to me, spurred me on to look more deeply into it.
I am a non-conformist/questioner by nature, and that very fear alerted me to the fact that something psychologically and culturally unhealthy was at play.
The more I have researched (from all sides), the more confident I have become in my stance/trusting my intuition and have even managed to get my initially 'be kind/live and let live' DH to shift his perspective to a large degree.
I've started to discuss it with some friends, but I still feel that hesitance- particularly professionally.
I think there has been a growing awareness and some shift in the media at large which feels hopeful. I find the Forstater and Bailey rulings in GC beliefs have added greatly to my confidence too.
I think it's just the weirdness of being in a position, for the first time, as a 50 something, of going against the grain of something considered to be a civil rights movement. Freaked me out and led to lots of self examination. I'm grateful for this though, as I feel I finally discovered feminism at the ripe old age of 50!
I first voiced my concerns in a book group discussion about child transition about 4 years ago with a small group of very close friends. It was the uncomfortable social experience I have ever had and totally freaked me out! It is so hard, especially as a woman, to feel like an outlier. I know that in that situation now, my thoughts would be much better formed and I could back them up with suitable research/changes of approach in other countries, Cass report etc.
Things have moved a long way, and I think it is extremely important to ride the current tide and keep talking. Talking 1:1 can be easier at first and gather your evidence/data to give you confidence in backing your opinions.
It doesn't matter if people don't agree, it's just important to go against that sense of 'i can't say that'.
There's also lots of great resources now to send in to people.
You are not alone. Lots of us, at various stages of realisation, knowledge and confidence on here and elsewhere.
MN us a goldmine!