Throw away the pie chart. It was designed for diagnosing problems in one handed bullseye shooting, not two handed shooting which is how most new shooters start off. You'll just end up chasing bullet holes and wasting money.
Dry fire alone will not fix this. Dry fire will demonstrate to yourself that you have the ability to maintain your sight picture while pressing the trigger to the rear. It will not expose poor technique or flinching under live fire. Once you become an expert at dry firing, you need to move onto Ball and Dummy Drills.
I'm too lazy to type out what that entails, but this is a good, concise explanation.
https://pistol-training.com/drills/ball-dummy-drill
It has nothing to do with how much trigger finger is on the trigger, stance, grip, how much pressure you have on the gun with each hand, where the sun is, what time of day it is, or whether you have your lucky hunting camo underpants on that day. Trigger control, sight alignment - that's all that matters at this point.