Thanks for sharing that... there are quite a few here who have not expereinced any training, or any real life encounters.
I'm a firm believer in dry fire practice, it will not harm newer guns but if you are concerned about it, use snap caps. If you have to rack the slide for every shot because of your choice of carry weapon, you might as well practice tap-rack-bang with each shot as well (misfire/malfunction practice).
I am also an advocate of muscle memory. Drawstroke/level/fire (optional). In most cases, you will not have time for an aimed first shot... as you may have learned, and an aimed shot is not guaranteed in stressful environs.
And don't feel bad... the hit rate for many professionals is pretty pathetic, too. NYPD recently shot 97 bullets at a perp... (multiple LEOS) 2... that's correct, TWO of 97 actually hit the BG. unfortunately, a bystander was also hit and killed... unknown whether the bullet was from LEO gun or BG's.
Get with an instructor who knows point shooting... (Suarez comes to mind)... your most likely encounter is going to be up close and personal... especially the ones where you actually have to fire the gun... If you can't draw and fire from hip height, you may not survive one of those "close encounters."