>>513776988 (OP)
As other anons mentioned, Mossberg 500 for general home defense. Buckshot solves all problems. For a lighter, reliable and portable option I recommend picking up a Rossi M88 .38 caliber revolver. Rossi purchased the tooling from S&W and hired a bunch of Germans to run the machinery back in the 80s, the ones you want say “imported by Interarms”. Extremely well built, reliable, cheap and effective.
Given that you don’t shoot much I recommend the revolver because it will always go off when you pull the trigger. Slide action pistols like glocks are great but you have to have proper form when shooting them or there’s a chance they’ll jam due to limp-wristing. Not to mention being caught in close quarters and having to shoot off hand, or from a weird angle.
For “extreme” home defense (5+ intruders), any bottom of the barrel AR (PSA) or cheap AK will do. I’ll let other anons chime in as to their recommendations on that front.