Jenny, it’s normal to be nervous about this, especially when it isn’t popular in mainstream circles, and Trans kids and their parents are being attacked by haters/zealots/fascists. But take heart, people are still transitioning.
The key is, build your courage and confidence by coming here often, and taking the sage advice of these folks. The last thing you want in public is a case of nerves.
I don’t know your beliefs, but I attended a Unitarian universalist church today, met a lovely, positive, young transwoman there. The population is very trans affirming and accepting, and I didn’t hear the words God or Jesus once, which is fine by me.
Take care, be happy! Peace