Thank you so much for the responses. I have made some updates based on your advice. Please see below for the other questions and advice accordingly. Right now I am trying to get at least one notification sent 5 days before due date. Please advice.
A - Updated
B - I have addDays(utcNow(),5) set up in the addDays and reduced the count to 20, I dont have a large list.
C- Thanks
D - Sending email notification to only one person in the Person Reporting field
E - Thanks