Should read the pot needs to have at least two inches covering the tops of the jars.
There is a Presto 16 quart as opposed to a larger one at 21-22 quart so 16 would be smaller and easier to lift and easier on the electric coils.
Johnny, I’m not sure I know what you want me to research - I know bacteria is bad and botulism can kill you, and rules for sterilization must be followed. The videos on Ball show every step to take to can safely. My mother pressure canned all the time I lived at home and we never got sick, so she followed the rules even back in those days.
I would not can something without knowing I was doing it exactly right for safety.