How can I secretly transition

Hi everyone. I visit this reddit from time to time and learned useful things from the posts here, but I haven't seen much on transitioning without other people knowing (sorry if there's already something on this). I'm convinced that the only way I can be happy with myself and live the life I want is to do this. But there are alot of things in the way. I'm at university (19 years old) and still live with my dad. This wouldn't be much of a problem except I know he wouldn't be very supportive of my decision after some of the things he's said. I'm afraid of being disowned and kicked out. If I was on my own, I think things could work. But lately I've felt increasingly depressed over things. I'm tired of putting on this facade. I've pretended to like guy things since I was young so I wouldn't disappoint him. But it's just killing me on the inside. I don't want to be a boy or do what people expect of me as one. Everything feels wrong. I wished that one day I would wake up as a girl constantly when I was younger. But now that I can do something about it, I think it needs to happen. If anyone out there has transitioned without their families knowing at first, it would mean a lot to me to know how you did it. I don't know how much longer I can live a lie.