Although I grew up shooting in the hills of WV and was always effective I moved to a state where ammo, even BBs, were tightly regulated.
To enjoy my shooting I joined a Sportsman Association with all the ranges for archery, silhouette, pistol, and rifle. However, I had to get a Carry Permit to get my guns to the club… which meant taking every NRA course available as well as written and performance tests. In short I had to go back to school to enjoy knowledge I though I already knew. But, I ended up learning a lot. Like when I turned a childhood electronics hobby into a profession, “book learnin” significantly enhanced my abilities.
Then, once I joined the pistol team that competed across the state, I practiced… hours, days, months shooting thousands of rounds one 5shot clip per target at a time… per week. After a time that S&W at the end of my arm shot itself. I watched in amazement.
There are precise, well documented, trainings for shooting disciplines. Get the documentation and get to know them, step by step. Then, after ten or twenty thousands of pellets down range you will begin to be a shooter. Begin, because what follows is but a small fraction of the shooting picture focused on a single element.
That said, I have one thing I do I learned from those pistol training days, the hows and whys of how to hold my trigger… hand. Not just my finger. The Herrett grips on my already excellent pistol ensured my hand, including trigger finger, thumb, and supporting three were always in THAT position.
Better rifles like my Huntsman have stocks with that same, very important, alignment in mind… including a ‘cubby’ for the thumb, but it can be emulated with any gun. This cubby on the back ridge of a grip/stock helps execute a precise, finely controlled, instinctive sear release… as the trigger is NOT pulled but squeezed between the trigger finger and the opposing thumb. No muscles involved but the gentle pinch between the forefinger’s tip and thumb. On guns with “normal” stocks/grips I fashion a reference for my thumb’s placement.
Knowledge combined with practice, practice, practice, practice. Some serious seated meditation is invaluable in teaching mental, and physical preparation.