You might value hearing other trans Buddhist voices. There's a book called Transcending you can read. I know of it from my partner, who is trans.
One key point of Buddhism is that excessive attachment to identity is often delusory, be it political, religious, or gender identity. As there is no separate, distinct self, who, exactly is trans, and does that thing one gender vs another, or is it something unique to this lifetime, this body/mind combo? The stories of the Buddhas past births include animals, men, women, all sorts. There may be no need to be reborn in one gender or another (or reborn at all if you choose Therevadan Buddhism).
Best wishes, let me know if any of this is unclear. 🙏🏻
So I'm also trans and I've gone on and off of HRT twice now (once for personal reasons, most recently because my body doesn't like spiro at all), and I've struggled with this same question a lot over the past few years as I've been growing spiritually and also embodying myself more honestly. The most valuable advice I can give you anonymously is twofold. First off, read this book. It has been the most helpful resource I've ever found when it comes to integrating trans identity with spirituality. It has dozens of trans people from all different walks of life. It addresses probably all of your questions along with questions you probably don't even know you have. Invaluable book, IMO.
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Something that has helped me a lot is realizing that as life altering and earthshattering as transitioning is, it's also really nothing at all. People are always changing, and our bodies are never the same as they were before. Before/after is also just a matter of perspective at the end of the day. Societally, emphasis and attention towards specifically trans people sort of accumulates like plaque around us because we're other'd. Ultimately though, transitioning and changing your body is something literally everybody does because we age. Aging is just more socially acceptable because its something that happens to everybody + it is without choice. What I'm trying to get at is that being trans at the end of the day is no different than any other mode of changing your body because it's all the same shit just a different permutation of change.
Everyone here has said really helpful things that make a lot of sense that help me out too. I think lots of people are just misunderstanding of why trans people are the way they are and why we do the things we do, so they say shit that doesn't make any sense lol.