Take a course, man. Best thing you can do is to find a reliable gun, and practice with it consistently. The GLOCK 19 is reliable as fuck. I carried one as a contractor for 2+ years in Iraq, and even in those conditions, it never failed with reasonable maintenance. But it all depends on how you shoot it. Some people just don't like em, and I'm not one to argue with that. All I know is I have been effective with them.