|A good place to start might be not calling them trannies. Some of them find the term offensive. I know it's a bit of a minefield there, but if you just specify transwomen, transmen, or (I hate this term--it sounds derogatory to me--but it's the only one I know of, other than transandrogyne and transintersex, which I coined myself) genderqueers, you should be safe on that point.|
I'm sort of in the same situation, though I'm quite certain I'm interested in them. I like both ciswomen and transwomen equally, both emotionally and sexually, and 3 of my major crushes (including one of my top 4) are transwomen. But I really don't have any dating experience at all, with people of any gender, and I've also never had the opportunity to actually spend time with a transwomen, other than chatting on facebook.
I would say that's the place to start. Spend time talking to them, online and in person. Not necessarily flirting or anything, just friendly chatting. Learn about their gender identity and treat them appropriately. If the person is a CD, for example, and MTF, they will probably identify as male; whereas one who is transgendered (ie. has gender dysphoria) will often identify as female. (It can be difficult sometimes--I talk occasionally on facebook with a very passable and attractive CD, and find it very difficult to think of him as a man.)
i myself am transgendering into a woman bet you couldnt tell but its pretty tough.
Yep, you look quite passable, and lovely too.