Only you can answer that question. I am by no means an enthusiast! But I have an opinion anywayBefore I purchased my gun, I borrowed several different guns of different sizes, etc. I went out over the course of two days and shot all of them several times. If I knew I hated it right away, I put it away and out of my mind. Eventually, I got it narrowed down to the one that was the most comfortable for me to shoot.
If you know someone who owns several hand guns that would take you shooting and let you try them all out, I'd recommend that route. More important than choosing your weapon is getting to know it after you've purchased it. It's fun at first, but you can't let the new wear off. Make sure you make time to familiarize yourself with it and shoot it as often as you can. Personally, if I go a long time between practices, I'm embarrassed at how long it takes me to get back to being able to move smoothly through the motions.
If it's for personal protection, it's not going to do you any good if you've forgotten how to use it.