^When you are shooting, you are less prone to notice things about your stance, grip, flinches, less than ideal shooting habit.
From the perspective of someone that knows little to nothing about guns, someone needs to explain things to them.
Even if you shoot pretty good, there is always someone out there that can watch you shoot and tell you how you can do it better.
There is a lot to be said about learning to be as efficient as possible in drawing a gun and firing that gun in one smooth motion.
There are different types of training for different situations. There is a local company that will send a instructor/consultant to your home and provide instruction on clearing your home in the event of an intruder with your preferred home defense weapon. They also have a facility where they offer a variety of courses designed at everything from basic instruction to more advanced shooting techniques.