Get a 12 gauge shotgun. Pump. Mossberg 500 or 590. Remington 870.
For a 22 LR , the Ruger 10/22 is phenomenal.If you want a bolt, Ruger, Marlin, etc. Lots of good ones out there.
Get an AR-15. Very common, and there will be lots of them out there with ammo.
Want a longer range gun, get a nice bolt 308. I love the Savage series now, they are accurate as crap. Price is right,too.
Hand gun-despite being a 1911 fan, I recommend a Glock 17 or 19. 9mm is dominate and common.
Nailed it.