RE: what hand gun to buy???????????????
If you want ease of cleaning and maintenance, get a revolver period. Open the wheel clean the barrel...yadda yadda oil here, oil there, and you're done. Auto's are great and I have twoautos, Ialso have two revolvers,.22lr, .40sw, .357mag, and .44mag.
Auto are more involved with cleaning even if some people on take them down into 3 parts, that's field cleaning and if you really want to get down and dirty there is much more to it, springs flying everywhere if you're not careful and you could loose an eye...well possibly...just kidding.
If you want a revolver I'd say go with a good used Colt or S&W in .357 mag. Auto I'd go with a .40S&W, this one is more difficult due to many on the market. I prefer Beretta, because I've had several Beretta shotguns and they never let me down, so I bought a Beretta 96 Inox, and it has been flawless.
I also wouldn't buy a Glock until you shoot one, the grip angles are slightly different thanmost and you may not be comfortable with it.