It depends upon WHAT you are training for.
Self defense?
Hunting?
Better accuracy at longer ranges?
Different purposes requires different training.
But by your post,, I'm assuming you mean self defense.
I agree with Jim. Get involved in a competition of some type that MAKES you have to think, move, reload, under some form of stress. USPSA, IDPA, & SASS all make you compete under the timer. And if you compete regularly you will have malfunctions, make mistakes, miss targets, hit wrong targets, & basically experience a lot of what MIGHT happen in real life.
You will learn "motor memory skills" with your firearm. You will learn to operate it w/o thinking. Just like driving a vehicle,, nobody who has driven a car a lot thinks about all the little steps it takes to operate a vehicle. You have trained your brain & body by repetition what needs to be done w/o physically thinking of each step.
Competition will do the same thing for you.
We shoot USPSA here at my range. My next match is this Saturday. I STRESS to any & all newbies that you will NOT start out being like those of us who've been doing this for a long time. AND,, this is VERY important; "DO NOT BE EMBARRASSED OR THINK YOU CAN NOT DO IT." None of us were born with any skills. We had to grow & learn skills, With time & practice,, those skills can & will improve. Even the world champions were newbies once.