It is easy to shock someone who cares about you with things like that. And it is kind of egoistic behaviour, but the thing is, the time might come when it is not possible any more to contain yourself... it is all about damage management, I think such things should come out in small dosages. Not like: "Hey, my dear family, I have been on hormones for 2 years, and here are my boobs, and the cock is gone, and I wear pink dress with ruffle." Things can be done gradually, like one day you tell them about your mood swings, and that sometimes you feel bad, and you feel like something is not right with your body... and after some time you add on top of that, give people time to process all bits of information you lay down on them. People's psyche is quite malleable, but not in an instant...