The four universal rules of firearms safety, combined with retention doctrine from military and law-enforcement close-quarters training. This module is awareness-only; live-fire training belongs with a certified instructor.
Understand the principles of firearm safety, retention, and cover so you can act wisely near any gun.
The four rules govern every firearm, always: treat it as loaded, muzzle only at what you are willing to destroy, finger off the trigger until on target, know your target and what is beyond it.
Cover and concealment are not the same word. A car door conceals you; the engine block covers you. A drywall interior wall conceals you; a brick pillar covers you. Live behind cover, not concealment.
At contact distance, a firearm is closer to a wrestling problem than a shooting problem. Whoever controls the muzzle direction controls the encounter. This is a doctrine module - live handling belongs in the hands of a certified instructor, in a certified range.