Ask them what took place in their minds, what errors they made and what they learned. Seeking actual experience is the most important fact and it will often conflict what your common sense and logic when you look at what some are trying to teach you. One great source is a jail or prison or talking with convicted criminals. Talking to a real home burglar is enough to send you running to your house to start major projects to secure it from burglary. Real burglars soon shock you into finding out what easy victims we are and what simple things we can do to stop a burglary.
Gun magazines are a poor source of training information.
They are almost always self-serving efforts for a mind set that is designed to profit a few. They boast efforts more designed to entertain and make movies. Much of the police world is also tainted by this mentality. You are going to be reliant on your common sense and efforts to learn the reality of crime and personal safety. Formal target shooting is of little value.