Finding the right cooking classes?
Cooking classes aren't the only way to learn cooking - in fact, they're a relatively expensive way to go about it, especially as it's hard to introduce all the various techniques in one lesson. 

There are any number of beginner's cook books out there that introduce basic concepts and techniques extremely well. There are masses of videos on YouTube covering just about every cooking topic and recipe*. Food blogs abound online. Check them all out, start with basic things like sauteeing onions, boiling eggs etc, and take it from there. I know this works, because it's pretty much what I did (though I started before I had the benefit of YouTube).

Another good way of learning is to find a friend who does cook and help them out chopping veg etc, and have them talk you through a basic recipe (like spaghetti bolognese) as they go. And of course, you can always ask the wizened sages of Seasoned Advice.

If you do decide to go for cooking classes, don't discount those focusing on a specific cuisine; food has to come from somewhere, and they all use the same basic set of techniques. There's only so many ways you can chop and heat foodstuffs after all. I started cooking by learning how to make a decent Chinese stir fry, for example.

*I realise I recommended YouTube in my answer to your other question, but it is a great resource. I don't work for them :)