+1 on the .22 rifle. They are easy to handle with virtually no recoil and not nearly as loud as larger rounds. They may not take down a larger animal though.
As for handgun brands, models, and calibers. They are as varied as people's opinions. Revolvers always work, semi automatics can jam, a .32 doesn't have knock down power, yadda yadda yadda. Try going to a range where they rent guns and try a few on for size. For self defense purposes I recommend getting the largest caliber that you can control. My father in law carries a .45ACP all the time where I sometimes carry a .380Auto. He complains about the weakness of the .380 round but it is my most accurate handgun and it is lighter than my .40S&W that is my usual carry gun so some circumstances demand that I carry the lighter of the 2.
As for handgun brands, models, and calibers. They are as varied as people's opinions. Revolvers always work, semi automatics can jam, a .32 doesn't have knock down power, yadda yadda yadda. Try going to a range where they rent guns and try a few on for size. For self defense purposes I recommend getting the largest caliber that you can control. My father in law carries a .45ACP all the time where I sometimes carry a .380Auto. He complains about the weakness of the .380 round but it is my most accurate handgun and it is lighter than my .40S&W that is my usual carry gun so some circumstances demand that I carry the lighter of the 2.