Really big broad brush you use in your statement

no problem, just don't over think it.
Was a long time after I became a Civilian for the first time, I did not carry a gun, I said a gun.
You must know yourself very well before you decide to carry a gun. Some times you need to detune
& learn to understand civil society. After years of training I am just like the rest of you now

Plumb Krazy LOL.
You hear a lot about muscle memory & how important it is.
Yet truth be known, there is nothing more dangerous than a scared man or woman with a Shotgun & their finger on your future or not.
2nd and most important: DON’T DIE!!!
In War everything behind your enemy is Enemy, in most cases that is. On a Civilian street that's not the case just how many &
what type weapon does the Target have? I have thought of, if you look like an Old fart well. Why not fake a heart attack then
shoot him in the Bung Hole from a good upward shot or 2

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Bob my first rule is Don't Die! Not until the target is down & dead.

My Father taught me to read, & how to read people & groups of people. Enter every situation with the thought you may need to fight something, Animal or Man does not matter. Semper Fi, be prepared all the time everywhere.
In any case it is The Element of Surprise that wins so, Play scared until you do some recon for others then surprise shots that count until you have the target
down & out! The toughest guy I ever knew had Tacicardia when the fire fight first began. Let's just say Moose was real fast to get his S- Together & fight
like a Banchee from hell from then on.
Gun shots real close inside can give you the big pucker no cure for that save some real anger aimed at the target.
Just my 0.1 cents worth.