Some of the jobs you've outlined there'll be pretty hard for you to walk into, unless you have the appropriate experience and/or qualifications. Might be best to see a careers advisor at your local JCP first, and discuss what might be available to you, taking into account what you've done already, or what opportunities there might be to train in one of those areas. You could also try writing letters to your local radio station, publishing houses, and TV companies, expressing your desire to work within that type of environment. I know that TV companies run workshops for youngsters, but perhaps for adults too, whereby yopu can get some idea of jobs both in front of the cameras and behind the scenes as well, but if you're lucky, expect to start at the bottom and work your way up.