There's always a way out, hon.
Your father seems to be the kind of person who is, with all due respect, ignorant of his own ignorance. That's usually the worst because such people don't believe they need to learn, thinking they already know.
In which case, all the talking in the world is just a waste of your time and energy since their minds are already made up and "no one's gonna tell me different." Perhaps the best thing to do is let your actions prove your resolve. After all, they speak louder than words.
Keep doing what you're doing and be patient. Every step you take towards achieving your goals is a step in the right direction, even the littlest thing that seems insignificant at the time. Every penny saved is a very tangible expression of intent. Every inquiry made shows you're being proactive in your approach.
You don't have to win with your father, hon. Eventually the weight of evidence of your sincerity and determination will be too much for him to ignore and then he'll come to realise the obvious - that it isn't a game and you're deadly serious. Or he won't. Either way, it's
your life, not his.
*hug* Hang in there, see every step you take as part of the larger picture, plan for that final outcome and when it feels hopeless, remember that circumstances change, things won't always be the way they are now. With the determination you quite obviously possess, it's only a matter of time. And in the end, it's inevitable.