this.
@HamTrainChickenLaser
Just by your being here doing research...asking this question, I'd say you'll do just fine. I have found over the years that most often these types of classes generally seem to be self-taught. I mean, a person will get out of it as much as they put into it.... don't prepare and don't try, and you won't get much out of it.
Your primary goal is to get the cert. To practice the fundamental skills with someone that can show things to you, help you, and keep you out of trouble. Along the way of course ask every question you can think of but you've got to "read the room" if that makes sense. Don't push an issue or criticize, etc... If the instructor starts spouting off a bunch of nonsense, just say ok and move on with life. Mostly it'll be just parroting what you've no doubt already read.
Your instructor might or might not give you some great explanations or insights about things you've never thought of. Might or might not be full of great tips and tricks that only years of experience would otherwise teach you....
But even if they don't offer any of those things, it's a pretty safe bet that they will at least be good in the water and will be there to keep you out of serious trouble like a good lifeguard while you experiment with the skills you read about in the book (yeah yeah, I know there's no book now)