i wish i could write what a correct stance and grip
but i cant,but i can tell what my grandfather charlie reed,and my stepfather dennis reed,both are the former owners of elm fork winchester gun range in irving drilled in to me was there are 2 seperate gripping techniques that are used,1 is the correct for a revolver,and one is correct for a automatic,neither of them are the wrist gripper or teacup as mentioned by someone,the one for the automatic has your index finger wraped around front of trigger guard,and you also have your webbing of skin out of slide path(obvious reasons),the other for a revolver has both hands gorrilla gripping the grips.your stance should be with your knees slightly bent,andyour feet at least your shoulder with apart .next you should have your elbows slightly bent(how ever much is comforatble for you,but not to close to face).........you ever seen sombody put a pistol up close to face to look down the sitghts and shoot and it comes back and hits face....lol....anyways you dont want it to happen....and lean forward like you are going to try to stop somebody from running out your door with all your money or something.....not to much because remember stability,comfort,and mobility to move in case you have to in a need be defense situation.....
as far as using your sights on gun,focus on front sight,you will be more accurate in your shooting,rear sight alighnment to the front sight will come natural,and as far as target is concerned at 15 to 25 feet and out to 25 yards you line your sights at the bottom edge of you bullseye,and siloette body targets you always aim center mass.....repeat "aim center mass"..anything closer then 15 to 25 feet try not using your sights,do reflex or instinct shooting,in other words pull from holster ,point ,and shoot just as soon as you get your stance (or better yet draw,stance,grip,point,trigger pull all at some time).........important thing to remember is when you are drawing weapon never take your eyes off your objective target,and keep trigger finger out from trigger until your have the bore coming up and close to fire time,and the key to reflex shooting is where ever you point that muzzle the very first time and your "intinct to point decides is where it needs to be" is the best place.......in other words if you try to overide you instincts and try to adjust yourself will make you off from where you need to be,,,,,,i used to instruct reflex shooting,and when the dallas swat team and some goverment groups came out i used to practice with them because i good at reflex shooting,and i am blind in 1 eye also and i shoot crosshanded from my blind eye........except for rifle and shotgun......
he is another teqnique to practice your pull and aim (this also helps with using sights for target shooting).........if you have a revolver that has a fixed firing pin on hammer...example is a smith and wesson 681 or 686 with a 4in barrel that has a flat ridge on top of barrel) and you place a dime at the tip of barrel behind the front sight and you grip it like your supposed to and pull that trigger until your finger cant pull no more and keeping that dime from coming off.i used to do that about 15 minutes at least once a week.....you will nitice a difference in your shooting...the reason you use a fixed firing pin revolver is
1.it wont damage firing pin
2.it is actually doing its own trigger job as you are doing this....i swear upon the graves of the two men who taught me this graves.......(thats also the reason the elm fork is not in family anymore,dennis died about 3 years ago,charlie died about 20 yrs ago)
anyways i hope this helps