im a 13 year old girl and i love motocross and my uncle races them and his son(my cousin) isn't in to them and hes glad that im into that and he is willing to teach me how to ride. but i want a dirt bike and my mom is all for it but she doesn't really have the money to get me one, but my dad has a ton of money in his savings and i really need to convince him to get me one......any advice?