When picking a good coach, there's a lot of information and ways to swing a golf club. Many teachers have good reputations for improving golf swings.
First, Mike suggests you look at what a specific coach is saying. Does it sound like something you can do?
If it makes sense to you physically, then you should try it. One or two things will happen. First, you may see yourself improve significantly in a short time. Second, you may stay the same and perhaps get worst. Mike advises that if you don't get substantially better quickly, don't stick with it.
Mike had a very well-respected coach that taught him at a young age. But Mike got sidetracked on his swing and wished he would have walked away sooner. The coach needed to be a better fit for what Mike wanted to do. His swing wasn't athletic but too tight and contrived and needed to be smoother. He was always overthinking.
First, and most importantly, listen to what the coach has to say; does it resonate with you? If it sounds too complicated and scientific, then it probably is.
The golf swing isn't a science; it's an art form. You must be careful as a player about how you get into positions. They may be correct; however, they may ruin you as a player.
Second, try it; if you see progress, stay with it. If you put some good practice time into it and aren't seeing improvement, don't stay with it. Again, make sure it makes sense to you.
Jack Nicklaus said when he goes with something, he tries it on the range, takes it to the course, and puts it on a practice round. If it works there, he might put it in a Pro-Am. Jack might then try it in the first round of a tournament. If it falls apart and he doesn't feel like he can make it work under pressure from his base swing, he won't stay with it. Jack didn't waste time chasing abstract ideas. He understood his base swing well, and if he tried something that didn't make him feel any better, he didn't stick with it.
Your instincts are probably better than many teachers telling you to do this and that. If your teacher tells you to do something and shows you how and when you do it, if there isn't an aha moment very early on, then don't stick with it.