Stuarte, If you understand your camera and your post-processing software, there's not much a "course" can teach you. They can't teach you to see wow-me images. You have to be able to see those before you go out to shoot. The thread just before this one "Discerning Good Images" that Rocco Penny started covered the subject at length. The best course you could take is probably in your local library: books by people like Eugene Atget, Henri Cartier-Bresson, Walker Evans, Dorothea Lange, Elliott Erwitt, Ansel Adams, Edward Weston, W. Eugene Smith, Robert Doisneau, Andre Kertesz, Paul Strand, Brassai, Steve McCurry, Robert Frank, Garry Winogrand, to name just a few. The best "structure" you can have is to discipline yourself to pick up one of those books every evening and really study the pictures in them. Some will wow you. Some won't. But after you've looked at them for a while you'll begin to develop an understand of what kind of picture wows you. Once you've learned that you're ready to go out with your camera.