I don't think it's possible to teach someone to shoot a pistol over an Internet thread, but I will tell you this. You're kind of asking the wrong question. What you need to focus on and pursue is skills. Or tasks. Not drills. A drill is an exercise of a skill. And there's a ton of different ways to practice a skill. Hence everyone's pet drill. Skills will usually often build progressively. In this day and age the progression of teaching someone to shoot a pistol has been established dozens of times. It depends on the use or job, but it shouldn't be a secret. I would also say, outside of competition, I would break down and categorize the progression between Basic Marksmanship and Combat Marksmanship. Basic marksmanship is slow and timed fire drills on bulls eye targets meant to teach and hone the 8(or big 4) marksmanship fundamentals. Combat Marksmanship uses timed and rapid fire drills on humanoid targets to teach tasks like multiple target engagements and transitions, speed mag changes without retention, TAC mag changes with retention, immediate and remedial action of malfunctions, rifle to pistol transitions.
It's hard to know where you are in the progression but here's some benchmarks.
25 meter bull, 10 mins, 10rds, B8 target repair center
Minimum for a beginner 70 points
Okay for a beginner 80 points
Minimum for an experienced shooter 90 points
Good for an experienced shooter 96 points
Presentation shot, 7 meters, 6" bull
1st round off the draw
Minimum 1.5 secs clean
Good 1 sec clean
El Prez, 10 meters, 3 x IPSC targets
Minimum 11 secs clean(A zone)
Good 8 secs clean
Speed Mag Change, IPSC target at 7 meters
From full extension, 2 RDS(1/1), 2 secs
Bill Drill, IPSC A zone, 7 meters
From the draw, 6 RDS, 3 secs minimum, 2 secs good
That covers accuracy and the fundamentals of MMS, presentation shot, multiple target engagements, rhythm drills, and speed mag change. After that you probably need to work on transitions moving into and out of positions.