None of this is advanced. It is the set of habits that separates people who shoot safely and improve from people who plateau and scare their neighbours at the range.
These are redundant on purpose. Any single rule broken is survivable; it takes two or more failing together to cause a tragedy.
Ten minutes of dry practice several times a week will do more for your shooting than a monthly box of ammunition. Clear the firearm, remove all live ammunition from the room, pick a safe backstop, and work grip, presentation and trigger press.
Most misses are the trigger, not the sights. Build a firm, high grip with the support hand doing most of the clamping, then press the trigger straight back without disturbing the sights. If your groups drift low-left (for a right-handed shooter), you are anticipating recoil — dry practice with an occasional dummy round mixed in will expose it.
Clean and lubricate on a schedule you will actually keep. Carry guns need checking more often than range guns because lint and sweat get into them. Inspect springs periodically — recoil and magazine springs are consumables, not permanent parts.
Store firearms secured and separate from unauthorised access, and know your state's storage requirements — several states mandate specific measures. A quick-access safe next to the bed is not the same as leaving a pistol in a nightstand drawer.