Okay so, I'm a half black half white 15 old boy. I want to have straight hair. Like a full white person. Ideas?

I have an Afro like the one Bill Cosby has or had I haven't seen him recently. But like it consists of tight little curls. I want (if possible) to have my hair straight to where it like will shake around like a white persons would if I were to shake my head. Somone please help out. I need/want all details and information anyone has on this. And please don't give me bull crap or call me gay. I don't need that. I'm being serious.