As someone who's worked within the media, your first aim should be to get a job in radio or TV - write to all the companies you can think of, offering your services. Many offer workshops where you can try your hand at various jobs, and then work it from there. There's also a website called Star Now, where you can post your profile. This covers everything from production work, musicals, acting, modelling, singing, etc., and is a good way of letting the right people know what you can do - or want to do. Best of luck.