I need someone to believe in me...?

well you sound really determined. you sound like you got it all planned out already. I think your dad might be mad at first but you should be old enough to choose your own path in life, maybe you can talk to your dad to find out why he doesn't want you to go. But if you think positive you can do it just put your mind to it. You said so yourself that you have been training hard for this, I say go for it once you over come some obstacles you can overcome anything. good luck