thats a very enjoyable piece, if a tad derivative.
but the facts that you say, your 14, and the lack of formal education make it all the more impressive.
you are really gifted and i think youd go far in any type of composition - that is if you continue your education, and of course - get your name and work known.
look at music college or other websites - they often give you advice on how to get a good carrer in scoring going.