I wouldn't transition, because doing so and not passing would mean ostracization in this society. In a world that could be accepting I may have, but that's bending the question. No, rather than transition, I would live as a martyr, trying to help the trans cause while being male.
It isn't a great option, but it's better than dying. At least I can still be as flamboyant as I want in this scenario... I'd be myself, but I would continue to avoid mirrors. I'd probably use a female voice too. I'd probably also be on hormones, so that I could at least feel a bit better, emotionally. And seeing as how intimate encounters would frustrate me to no end with a penis, I'd like to get SRS too. And while I'm at it, I would also get FFS. And probably wear feminine clothes, too.
Gee. If I couldn't transition because I couldn't pass, I'd still do all that. I'd just present as "male."