I really want to play in a film orchestra. How would I go about achieving this goal?

I am 18 years old and I am looking into career options. Becoming part of a film orchestra has always appealed to me, and I have played Tuba for one year and would like to play this instrument in a film orchestra. I am just wondering what different steps would I have to take to become a part of a film orchestra with this instrument.|||Practice the tuba and play in a lot of events so someone can discover you.