Like a lot of the posters here I have had enough time and training to offer comments and advice.
Rather than offering comments which would be best offered one to one on the range I would make a suggestion.
Try and track down a copy of competitive pistol shooting by Dr Lazlo Antal. It is out of date as far as the hardware goes, but the best on the theory and instruction for basics and traditional one hand target shooting.
For two hand practical style shooting there was a small book by Martin Speirs (sp?). I don't remember the title on this one and I don't have my copy at hand. I am sure there are lots of others now but I haven't kept track.
(advice given to me by a captain of a national squad, "it doesn't really matter what you see, as long as you see the same thing every time!")