Reddit reviews The Dry Fire Primer

Inconsistent grip is probably your biggest problem right now.

Bob Vogel:
https://youtu.be/45QhpvY9LZc

Mike Seeklander:
https://youtu.be/HgtAFLsXnVs

Dryfire. A lot. I have a lot of different tools that I use. MANTIS, Sirt Pistol, CoolFire trainer.... You don't need to go out and buy a bunch of stuff. But you should buy and read a couple of dryfire primers to get an idea of what you need to do:

The Dry Fire Primer https://www.amazon.com/dp/B0785Y4QGN/ref=cm_sw_r_cp_apa_i_femoDbVGN7BD0

http://shop.andersonshooting.com/Books/Refinement-and-Repetition.html

https://benstoegerproshop.com/dryfire-book-combo-pack-dry-fire-training-reloaded-for-the-practical-pistol-shooter-paperback-book-and-scaled-targets/


I spend between an half hour and an hour a day on dryfire. 2 15 minute sessions a day to begin with will do a lot for you.

I also recommend people work on their grip strength, as that is the number one problem I see in students:
http://www.ironmind.com/product-info/about-grip-strength-and-hand-health-/hand-grippers-training-faq/

A note on trigger control/management: stop over thinking it. Unless you are doing something DRASTICALLY wrong (which, based on your pie plate, you aren't), it doesn't come into to play until you start to push at 25 yards and beyond, or you're looking to make the jump from an A class shooter to Master or Grand Master. Too much this, not enough that, improper placement of this knuckle over that location...is all basically bullshit.

Also, find local USPSA matches and go shoot.

Lastly, practice deliberately. Have goals for your training sessions. Set your phone up to record you and then go back and review what your movements look like.