Training at home-
One thing that will help you immensly is to get out of your comfort zone. That's where IDPA, USPSA and other shooting activities come in. You will never realize what you don't know until exposed to situations where you respond to set up's and scenerios that are not of your designs.
Then comes the buzzer, witnesses, shooting against/with really advanced shooters, etc, etc. Even if you need to travel to participate in an organized shoot, do so for the exposure. There are a multitude of training schools that are highly recommended, consider one. We limit ourselves by only poking holes in paper in our confort zone, you need to see the elephant at least once.
IDPA requires a handgun, two mag pouches, a holster that covers the trigger, three mag's minimum and couple hundred rounds for first match, ear/eye protection, USPSA, same except more mag's, means to carry them, and lots of ammo. Let us know how it goes, please.