Finally, we consider the pistol. I personally have a Glock 17 chambered in 9mm by my bed secured in a “fast-opening” safe. You can also consider a revolver. You should consider a caliber that is effective for self-defense and you can control. There are self-defense options for both revolvers and semi-autos. My preference for a striker-fired pistol is based on ease of manipulation without an excess of controls to be concerned about.
One of the obvious benefits of a handgun is the advantage of size, making it ideal for close-quarters maneuvering. With most choices at an overall length of 7 to 8 inches, they are easily handled in tight spaces, around corners, etc. In addition to their size, they are relatively light weight, around 2 pounds, compared to the shotgun, around 7 to 8 pounds, or rifle, at around 6 to 7 pounds.
Also, without the need for two-handed manipulation like with a shotgun or rifle, a handheld light can be utilized. I prefer a mounted light even with a handgun. It can be a challenge with a revolver, but you are able to manipulate a handheld light with either platform.