I want to get involved and perform in the musical Jesus Christ Superstar, but I have no idea how!

If you're interested in a story, you can read it! but maybe just skip to the end :P My school is currently involved in doing Jesus Christ Supersar. On just a whim, I decided to give it a shot. I'd never done a musical before, and due to some of the hard vocals and it being a school with limited talent, my teacher (director) asked me to audition for Jesus. I did pretty well in the auditions, and got call backs for infact Judas, but in the end I ended up being an apostle. However, I accepted it, knowing my voice was only young in training and I wasnt experienced in theatre or vocalls enough to take on a lead role. As I got more involved, i connected with the musical like i've never connected with any music ever. I had an epiphany. It changed my life. I began to be able tot understand the story like i never thought I could, and coupled with some amazing music which inspires emotion, the musical began to make me almost go into states of depression. The story, the morals raised, everything, was just incredible. Although I sill accept the people playing the lead roles do have more capable voices than i (only at present/auditions, I am getting much more experienced), none of them can understand. WHy should they? They are all just school students, but it frustrated me to no end, waching literally noone in the show have any idea about the emotions, or story conveyed. enough of my complaining, I would love to get involved. Outside school I would be prepared to involve myselves in other musicals and other chorus parts until I was considered ready, but preferably go straight to lead. I know that the characters of Judas and Jesus i can entirely identify with, and can truly take on the role and understand it. I probably sound like the most arrogant person in the world, but i really just... cant explain it. My world is now different because of this. If anyone would know anyway I can get involved in this... how o go abou auditions, where productions are held, Drama schools, anything. :)