I did one evening a week in a classroom for dayskipper, cost about 30 or 40 quid (adult education centres were heavily subsidised back then).
Enjoyed it so much I did the Yachtmaster theory the following term.
Never did a practical, I was lucky I had friends who had experience so they helped in the early days, it can be scary on your own the first few times, in fact I don't think I ever stopped being a little scared, at night or in fog, or just being out of sight of land and all you can see is sea, or getting caught in weather a lot rougher than forecast.