Originally Posted by
Revolver
I know my opinion may upset those that like to get into 9mm vs. .45ACP arguments but the 9mm Luger, .40 S&W, and .45ACP are all somewhat-anemic rounds. They all fill the same role as far as I'm concerned(which is to serve as an alternative when a proper defensive weapon is not available. ). Keep in mind these are PISTOLS we're talking about. Don't think you're gaining a huge advantage with one caliber over the other. Use what you are most comfortable with.
As somewhat of a "beginner" I would recommend a 9mm Luger or .38 Special chambered pistol to become proficient. You can always get a different pistol later down the road.