I think it's a good idea. I went to Rick's class some years ago, and plan to go to his combination class/hog shoot in Abilene this April. I've also gone to Rod Jenkins's class twice. I think that most people could benefit from having a coach who could tune up their shooting on a regular basis, or if an archery coach is not available, to attend classes by instructors who are known to be good. I try to do something like that every year or so.
Was your elbow injury archery related? If so, you want to make sure that is resolved before you push it with too much archery shooting. If it were me, I would want to reach some kind of stability before I went to any more classes.
I think that one of the main reasons archery has such a fascination for us is that it isn't easy, and just because you learn basic good form doesn't mean that you are going to shoot good all the time from then on. I regularly shoot with a group of 5-8 people, and sometimes I will be on top, sometimes I will be on the bottom. Some of the people will consistently be on the top, but those people will sometimes be on the bottom too. Sometimes two people will be hot and will be fighting it out for first place, but it's not the same two people all the time.
We're not nationally ranked shooters; just fair to middling local club shooters. But if we were nationally ranked shooters, it would be the same thing, just at a different level: some days hot, some days not so hot.
Just focus on each shot without any thoughts of past or future shots, and hopefully enjoy each other's company. When you're shooting, try to expand your awareness of your own body with each shot, with the goal of noticing what is causing one shot to be good and another shot to be bad. Be patient and non-judgemental with that; self-awareness comes slowly. No class can do that for you. Shoot as often as you can (or as often as your elbow lets you), and you will gradually improve. Classes or personal coaching can jump those improvements a little, but they're not going to eliminate the good days and bad days.