You should definitely own a gun safe. Cannon has very good ones on sale right now for around $700.00. You should NOT ever fire a gun without hearing protection. So, you're one of those guys who intends to use a shotgun for home protection - Huh. When I was young we never wore hearing protectors when we fired. I went to dozens and dozens of shooting matches without any sort of hearing protection. Today? I have mild tinnitus.
One thing I did right is that for more than 20 years I used a long-barreled, S&W Model 41, 22 LR pistol for interior home security. I kept it and two extra magazines by my bed at night. Back in those days it was easy to get solid point 22 LR bullets. Trust me, it would have been a serious mistake to break into our home at night; AND I wouldn't have destroyed our home or appliances every time I pulled the trigger, either.
The fact that you can, 'hear OK' right now means nothing. How well you are able to hear in 15 or 20 years is the question. Wear the muffs, OK!