The secret ingredient in Granny’s self-defense is that she cheats. She didn’t fight fair. Neither should you. There are legal cheats that let the good guys survive.
The truth is that most people do a pretty good job at defending themselves without much training. The truth is that you are not a gunfighter. A gunfighter wins because of speed and accuracy. You are a defender, and you survive because the particular way you fight makes you hard to kill.
The truth is that crime happens all the time and everywhere. Of course, we want to stay away from a riot, but a third of us are violently attacked at home. The other two-thirds of violent attacks occur away from home. No place is absolutely safe, not at work, not at the store, and not as we travel. That is why you want your defensive tools with you all the time. Those tools include a firearm, a phone, and most importantly, the knowledge of how to use them. Your attackers expect an unarmed victim, but you cheated.
The truth is that you must be awake to defend yourself. That is why you lock your doors and windows. That way, the bad guys make noise as they try to get to you. You want an alarm. It can be an electronic alarm, or a dog, or both. Your dog is an alarm, but you are the defender. You need a plan that works when you’re only half-awake.
The truth is that people are irreplaceable. You want to leave the lights on in the center of your house. Let the thugs take your TV and your computer. Let them steal your bottles of booze. Hide your family behind you as they huddle in the far corner of a dark room. You survive because you shoot the bad guys as they come down your bedroom hallway with the light behind them. You survive because only a gun barrel and a small part of your face is exposed, but maybe the bad guys can’t even see that. You’re effectively invisible if you stay away from the door frame and stay hidden in shadows. You and your family survive an attack because you made the bad guys come to you. You survive because you can see them and they can’t see you. That said, you must see them so you don’t shoot your neighbor who is knocking at your door to tell you that thugs lit your fence on fire. Good guys identify their target before they shoot, and you want to be one of the good guys.
Go read it all. And think about your home, how you would defend yourself and loved ones make a plan, talk to law enforcement, and people who do security, and yes, feel free to cheat