My two cents:
There really is no substitute for instruction from someone who knows what they are doing and can communicate it.
Advice of practice is all good, but without knowing what to practice, the results can be disappointing.
If your gun and sights are not automatically coming back to target, then your technique is probably at fault.
And it's very difficult to figure out what needs work on your own.
Lock the doors, they're coming in the windows.