I headed up a post production company in Vancouver for about fifteen years and I agree with Gary 100%. It's a huge business and if you want to be in that business you gotta be serious and ready to deliver instantly. Movies/TV series are a long shot because you are always up against the music supervisor's favorite composer who writes the music for the entire show(s). I rented space in our company to a composer and he did nothing but write for shows 24/7. Commercials IMO are a better bet because there are millions of them and they only need a chunk of what you've produced...but you have to be a pro

Steve

Creators of music have a responsibility to their craft. When they have finished using all the notes and words, they must pass them down to the next generation with a simple request. “Use these to create new music.”...Steven McDonald