Yeah I'm new to this as well, and I have to agree with xeberus, family classes for just about anything will get your screwed. As my old track coach used to say, "you get out of it what you put into it." Now I hated that guy more than anybody, but he was smart at least for a stupid baldie.
Anyway, to make a long story short, find a decent gym, converse with some of the teachers/coaches/masters and find out if they know what they are talking about. The more expensive they are, and if they have their own location and they aren't at your local school gym, then you should be in good shape.