I took part of your first line "turn on POP3 within your gmail account" and googled it and I'm working on it now.
I think I did sign up for Google One when the amount of unread google mail exceeded some limit, and I was supposed to make a bigger effort to read it, delete it, and stop paying for storage. No, could that be it when there are only 2300 gmails stored there? We shall see.
Regardless, I definitely should read my gmail and this will make it happen.
I had already set up a gmail persona in my pop reader, but not done the part you explain above, Bob.