The journey we go on to learn more about ourselves isn't always simple and straightforward.
There were very brief moments in my past when I wondered if I might not be cis, but with consideration decided I would be upset if I was called a man. I realized, "oh! that must be what trans people experience all the time! that sucks!"
so we can take these times when we weren't sure of ourselves, and use our memories from then to embolden our allyship. I'm glad you've decided to go that route. there are so many lgbt people being hurt by religion right now, and if you can unambiguously accept them and love them for who they are (not in spite of), you might help someone keep going when they might otherwise opt not to.