I understand the issues very well. I had to deal with my parents as well. Let's just say that we have not talked for about 20 years now. We are like complete strangers now. It's sad, but it's life. Don't try to second guess how people will react either because generally it will be wrong. Maybe your parents will come around maybe not. If they don't then your options are, no transition until you are capable of supporting yourself, finding a friends basement or something you can live in or just suck it up and don't do anything. On the other hand you might find a welcoming hand or maybe even a partially welcoming hand. If you do, then try doing what you can without losing your support network. You really should discuss this with a therapist though. There is way more than just hormones and such as you are finding out.