Noticing Newbies

Hi, i'm Laura,
firstly i would like to say that i'm not very keen on posting my work on the internet but i will if i HAVE to,
secondly i love writing, my aims are to finish a novel before i finish school, and go to Oxford university :) did i say aims? Delusions of grandeur more like :L
My Idol has got to be Christopher Nolan, i know he does films but he writes them so amazingly, and i want to write a novel like that, i joined this forum because i have no IDEA where to start, and i hoped that everyone could help me
Love you all, especially the people that reply :P
xxx