Unfortunately there is no one "right" answer for which holster will work for you. Everyone has different needs when it comes to what "works".
If you spend most of your day seated, you will need something different than someone who spends more time on their feet. Body type is a factor also. I am 5'-8" tall 175 lbs. So what I use will not work for someone larger. Gun type will also be a deciding factor.
I wish, like you, that there was an outlet with "try out" holsters, but unfortunately they don't exist, but, if you want to get out of teaching, it would definitely be a money making enterprise.
If you have to wear a jacket, you may even look at shoulder holsters.
Just trying to complicate things.
