I with the ones who say, "Keep with it"--few things are immediately successful, most require reworking and adjusting to get them up and running. Sounds like you've got your "product" pretty well worked out, now all you have to do is develop your market, which is a fancy way of saying you've got to figure out how to find the people who want what you've got--

One idea--Don't know how it works in the UK, but in th US, bookstore chains like Borders like to feature workshops of one kind or another, and you could deliver a short, entertaining and informative demonstration that you'd get paid a (small) fee for, and you could filter interested parties into your full workshop--

I know that there are a lot of people out there who are interested in this sort of thing, and if your patient, you'll find them--