Career Advice for Drone operator/engineer

I am due to leave the RAF next year and have the opportunity to do some courses which have the potential to earn some income from flying drones.

However, apart from a few bits of film and photos, I currently have no experience or idea of whether it would be worth pursuing as a new career.

Does anyone have any advice of the drone industry? Gaps in the market etc? How do drone operators earn a living? (other than training courses and drone sales)

Thanks,

Paul