Couple things....
First I am sorry about the idiots out there that don't have any respect for your property. Secondly, I felt the same way you do now for a long time before I got my first handgun. I had just bought a new house, and in a pretty good neighborhood. However, bad neighborhoods are always way too close to the good sometimes, and I kept hearing about rapes/murders/break-ins way too close to where I live. I also had a pretty wife at the time and no dogs or anything to protect my property because we worked so much. I had martial arts training for years, but that does no good with an armed robber. So I kept having bad dreams about what could happen. Got my first handgun and dreams went away. If you feel this way, it's worth the piece of mind even if you never have to use it to protect yourself.
- Shotguns are probably ultimate in home defense, but harder to secure in the home while keeping it accessible
- Revolvers are most reliable, but hold the least ammo
- Use the largest caliber you are comfortable with. 9MM will do the job, but I like .40 for its blend of stopping power and penetration while not being too much to handle. Good hollowpoints can up the effectiveness of a smaller caliber if you are not comfortable with a larger one. Pick a reliable, easy to use weapon such as a Springfield XD (my favorite) or Glock. Berettas have some additional safeties on them but are a little more complicated.
- Practice on the range several times a year and learn how to properly maintain your gun. It really is easy once you learn the first time. Going to the range is one of my best stress relievers!
- Have a plan to properly secure your gun. I have this small biometric safe in my bedroom bolted in the closet -
Gunvault Biometric - and can go from a dead sleep in bed to loaded up and ready to go in less than 5 seconds while the guns are completely secure at all times.
I hope some of this advice helps! A lot of people are freaking out now that Obama is going into office, as he is very anti-gun, especially handgun. It might not happen right away, but limits like lower capacity clips may be reinstated so you might want to get the one you want sooner rather than later.