Bruce, to be completely frank, it’s not easy to fill a class with any specific demographic, and as such, unless you have several friends already lined up and in agreement that they will drop a random weekend and all venture off together to attend a class, it probably ain’t gonna happen. I’m not saying that to crush your training goals, just to say that attending a normal open-enrollment class shouldn’t be written off.
You also have the option of one on one/individual training. While the rate will generally be higher per hour for the individual student with a lower take-home for the instructor, it does allow for a very intimate and personal training experience. I don’t know if that is an option for you, but if you have performance anxiety, it is a good way to
I can’t speak for every other trainer out there, but I have absolutely no problem with a student for letting me know, “Kneeling ain’t gonna happen, and I am not running anywhere for anything, and I can’t see out of my left eye.” No problem. Do what you can do, and I will alter drills to your physical ability, and you can sit-out those drills that you are not up to.
I want you to come out a better shooter than you came in as, that’s my job, that’s what I am getting paid to do, as I see it. To me, that means understanding the individual and crafting the training to their needs, not trying to make them conform to something that doesn’t work for them. Those that try to emulate the prototypical Marine DI don’t last long in the training world (there is also a reason that DIs aren’t the ones that teach USMC recruits in entry-level marksmanship).
I have worked with men and women, the young and the elderly, those of world class physical condition and those that have been disabled by injury or age. I know that I am not unique in those experiences in the training world.
I think that you may need to be more selective of the instructor(s) to work with than the “average” shooter, but not at the cost of not training.
This is, of course, my opinon. Not knowing the extent of your impediment it is difficult to give much more than a general impression of the topic.