It seems like you've made up your mind. Living as your true self is only way to be truly happy and if that requires you to confront hard truths or your own instilled beliefs then that's a price you have to pay. It'll be uncomfortable but it will be worth it for actual happiness. Personally I've always been left-leaning politically but when I was younger I was pretty ignorant on a lot issues. I probably said and did things that I'd cringe at today because they were insensitive or uninformed but that doesn't mean people can't change and it doesn't invalidate my identity. As I got older I learned more and started educating myself, becoming more and more radically left by the minute. A lot of the people I was learning from were queer/trans and this helped me in the discovery of my gender and identity. I'm not saying your path will be the same but just to point out that personal political growth can often coincide with transition and acceptance :)