Personally I feel I benefited from an evening course at my local college. I did C&G Level 2 photography.
It encouraged me to try a lot of things I wouldn't have on my own, B&W, Portrait, Studio Lighting, B&W Film and home developing. Also the face to face rapport with other enthusiasts and my tutor is invaluable.
Not all people can learn from reading / internet etc. The ones that can tend to be the type that hang around here!
So if you feel you need a course start checking out your local colleges and Adult Education centres!