I think when your biological sex, and gender identification are in line it is hard to know what it would feel like if they were not.
A friend and colleague of mine (male) who identified as female his whole life only went through the transition at age 79 - full op. "T" was an British RAF pilot in WWII, was married, had 2 children and was a respected sociology professor (mainly criminology) at a Canadian university. She did not go through the change while she was married as her wife was completely against it. After her wife died she went ahead with the op against the recommendations of her doctor and never regretted it.
For whatever reason she identified as female from a young child. Her parents who were quite well to do took her to the best psychiatrists on Harley Street, London when she was a teen in an effort to "cure" her. While they could *not change the way she felt they did manage to control her life choices. "T" always was extremely understanding of why they did that, and did not seem to hold grudges. Before she died she spent the best part of her last decade living as she wanted.
A lot of my understanding of trans come from my conversations with "T" although we talked about many different things, especially the prison systems (of which she was most knowledgeable).
I don't know what she would make of the developments in the gender conversation (or should I say monologue) coming out of universities today. As a proponent of free speech I have a feeling she would be a Jordan Peterson supporter!