Another thing you could do is to take your interest in something, say, space exploration and look at related jobs and then see what backgrounds are required for those jobs.
Look at the NASA careers site and see what jobs are available and what requirements they have.
https://www.nasa.gov/careers
Look at LinkedIn and search for people who work at NASA and see what their jobs are and what background they have.
Look at the NASA site and look at videos and such…do you want to be one of the people explaining space to the public? Creating simulation videos? Working on the Website? Being in the control room? Writing about the space program?