IMHO here is my in depth opinion on this subject matter of what firearms are needed to properly protect your home.
If you are going to defend your home with firearms. Congratulations on being a badass who protects their castle. You now need to have at least 3 firearms in your personal armory and accessible for immediate us at all times.
You'll need a shotgun first. Which is excellent for when you have to deal with wild life such as bears. Who force their way into your home looking for food. Now you are suddenly on the menu. Preferably 12 gauge slugs, or some serious 00 buck shot. Will do the trick nicely. Then you'll have enough bear meat to last you a year too.
Here is my recommendation for a proven reliable pump action shotgun. That has been kicking ass for the USA since WW2.
https://www.mossberg.com/590a1-retrograde-51665.html
An AR style pistol for when you have to deal with close quarters battles with humans, or aliens if some sci-fi shit happens, because fuck why not, things are already batshit crazy. This has a distinct advantage over shotguns in this scenario. Due to slow reload times and inferior round capacity. Plus patching up smaller bullet holes compared to shotgun slug, or buckshot holes. Is a heck of a lot easier.
Here is my recommendation for an AR style pistol in 10mm. That runs flawlessly like a scalded dog according to Johnny B. It a my bucket list gun to buy for me someday.
https://cmmg.com/pistol-banshee-mk10-10mm-8
You should also have a sidearm pisto. This is ideal for when you must have something ready to go within arms reach right next to you on the night stand. So you can defend yourself in under well under 10 seconds. Should you need to unleash deadly justice upon an intruder who is already inside, at your bedroom door, is breathing heavily, is looking very rapey, and not at your wife.
This is my recommendation for the perfect nightstand pistol and backup sidearm for dealing with any wanted bumps in the night. When accompanied with a couple 32 round promag magazines, red dot optics, and a solid weapon light with a green laser combo. It becomes truly formatable. It is also one of the very few pistols which is proven to function reliably in subzero temperatures. Even after it was covered in solid ice, or filthy mud too.
https://www.smith-wesson.com/product/m-p-9-m2.0-thumb-safety-optics-ready-full-size-series