I am learning BSL as part of my Bronze Duke of Edinburgh Award. I am doing an introductory course on the British Sign Language website which I would strongly recommend to anyone, especially people doing DofE.
It was very easy to find and start the course - it was one of the suggested skills (3 month) courses on the DofE website for the Bronze award. It cost £25 to enroll, but the experience I have had learning BSL on there was worth the money.
I enjoy learning languages, and BSL has really interested me. Now I feel more confident around people to read the body and sign language.