Yes, my shotgun experience is limited strictly to a few blasts from an 870 at some misbehaving cans. I'll need to find some competent training. Most of my experience is with handguns. When I first started getting into firearms, my policy was only to buy what I could carry around with me on the street...without scaring people.
Now I'm expanding into longarms, and I'll need to get some training on the rifle as well. Luckily, I have a highly-qualified ex-Marine co-worker who does security and firearms training on the side.
I have a nice Marlin .22LR that I've been using to get a feel for rifle shooting. Once my C&R comes in, I plan to pick up an SKS for $100 or so. And then, this summer, I plan to build an AR from kit. (J&T kit, Oly lower, most likely.)
Unfortunately, I currently live in an apartment, which greatly limits my defensive ammo choices when at home. Since I live on the top floor I have a few more clear lines of fire than I would otherwise - from a loss of life standpoint. I'm sure the complex would bill me for any damage to the roof...which would be quite expensive.
Is birdshot a safe bet for apartment use, or is there something even lighter I should pick instead? Rock salt? Oatmeal? Rice Krispies?