i did an interior design course, it was so much fun actually learning and its really quite fun measuring your own house out just to put it on paper and play around with ideas. you could even end up making some good money!!
its 2 x 1 week in studio (ok if you can get the time off), with 4 weeks in between home studying and i went to the nda in nottingham. i know you said not classroom based, but its not the typical teacher talking at you type of learning!!
see nda.ac.uk xx