I love studying and learning about Jehovah. I believe in him so much now, but I'm a trans woman, having GRS 12 years ago and starting hormones 20 years ago. The Congregation found out a week ago. Meeting with the Elders soon, but feel that I should leave and I just feel so sad now.
Good luck. As sensitive and understanding as I'd like to be, I can assure you that they are going to give you some bullshit about homosexuality, probably citing some bible verse from I-forgot-where, and telling you that Jehovah will help you stay in your biological gender.
When it comes to sexuality, the Wt's teachings are very archaic. They don't even get basic human sexuality right, leave alone gender identity or sexual orientation. Don't expect a lot of love from them in that regard.
In the city where I live there are plenty of resources from transgender people and their spirituality. I think that aside from this forum, find some support group for trans women. That may give you at least some understanding from people who are also transgender and integrating healthy spirituality in their lives.
BTW, they don't call it "GRS" anymore. The right term is "Gender Confirmation Surgery", not "Gender Reassignment Surgery".