Glocks are popular for a reason. As far as buying one, you should see if you can find a range that will rent them to you first. To my experience, different people "click" with different guns, and so if you're going to spend that much money on something, it's worth trying it out first. I'd also highly recommend taking a basic pistol course of some kind, whereby someone can walk you through basic operation and safety and maybe teach you some marksmanship too. Beyond that, it's a perishable skill, so if you do want it for self-defense, make sure you practice and practice often! One last thing: I for one wouldn't keep one in the glove box when I'm not in the car. It's just asking to get it stolen. On a related note, never put a bumper sticker on your car that suggests you're into shooting--that is a great big sign that says "break into this car."
Yup, I have found a range that offers a class/where I can practice. No such luck on finding a place that will rent though. Thanks for the advice on the car. Although, that was my primary reason to go with a pistol over something like a .22 to learn how to shoot/properly care for a weapon. Should I change my plans?
Not necessarily. Also, you'll want to see what your state's laws are about carrying one that way without a permit. I have a set-up in my car (basically an outside-the-waistband holster attached to the inside of my center console) for when I'm driving around, since a weapon on my belt is too hard to get to. But I try to avoid leaving it in the car whenever I can. Honestly, these days 9mm is easier to get than .22. Plus you have more flexibility with a decent pistol; if you decide to start carrying it one day, you won't have to buy a new gun (granted that's fun too).