Believe me, I know how you feel,
I took a good four years just thinking about it before I was even comfortable in calling myself trans.
Sometimes, we need an awful lot of time to make sure that this is the right step for us.
As long as you're slow about it, and careful, I think that you'll come to the right conclusion, even if it takes you another twenty years.
Whenever my family asks me how I know that transition is the right step for me,
I tell them this,
"Honestly, I don't know if it's right, and I don't know if I'll regret it ten, twenty, or thirty years from now, but I do know how uncomfortable I am in my skin and I know that if I don't even try to make it better, then I'll always regret it as opposed to possibly finding the 'right' answer,"
I know that I can't really help you with this, but I wish you the best of luck!