People who choose to manage their own safety to the maximum need to become proficient with their chosen self-defense weaponry. And, they need to seriously consider the lengths to which they are willing to go to protect themselves, their loved ones, and their property.
I highly recommend the book “On Killing” by Lt. Col. Dave Grossman. It’s a good starting point in the process.
It is available in its entirety for free at: https://archive.org/download/On_Killing/On_Killing.pdf