Every piece of 'music' or 'sound' you hear in TV commercials, TV shows, movies, documentaries, had to be 'cleared' and 'licensed' for 'use'. The creator retains ownership, and can re-license it for other 'uses'. It can be very lucrative.
A certain well-known music industry entity contacted Cathy Heller of CatchTheMoonMusic to teach their 'artists' how to make a living while they were becoming 'artists', making a living singing Songs, recording and performing.
And it's a global market. Your creations could be licensed for use in other countries as well as the U. S.
The workshop's about an hour a day, with homework, to do the things working in that market requires, to learn how.
It's a remarkably under-served market almost anyone with recording capabilities, and internet skills can enter into.
If you've got 'supply' they've got 'demand'. Think of how many TV channels there are, and how many TV shows, how many commercial ads. All of them want music, or, I like to add, 'sounds'. I notice Movie Trailers often have dramatic sounds, 'slams', 'bangs', as well as 'music'. Intriguing.

There will always be another song to be written. Someone will write it. Why not you? www.garyeandrews.com