Hi Jimmy,
There is a different culture/mindset between USPSA (IPSC) and IDPA. You'll probably be best served to give both a try and see which is for you. Keep in mind, IDPA is sometimes viewed as "real world" but the truth is, anytime a timer is running its just a game.
As an example of the different rules/mindsets, I'm and old IPSC shooter who recently shot a couple of IDPA matches. It just isn't for me because some of the rules just don't jive with my background. For instance, the last stage I shot the previous shooter fired an extra round (intentionally dumped it) and reloaded from slide lock. I shot the stage and did a speed reload (dropped the empty mag on the ground) with a round still in the chamber. There was no competitive advantage and I was doing what IPSC shooters do (not running the gun dry, if possible). Guess who racked up a penalty?
Another possibility if they are offered in your area is "outlaw" type matches. In my experience these can be the most fun of all.