You’re very welcome.
Even seasoned travelers go through this as well, although that “one minute” sounds like you had an unusually tough crew.
It’s not quite as disorganized as it looks. The conductors usually go through periodically and announce, for example, “New London next, only three doors will open” and pull the tickets of people getting off there. Sometimes they know which doors and can tell you, other times they don’t know themselves til practically at the station.
What I have done in the past is ask the conductor when they come through for the stop before mine. For example, if I were getting off at Mystic, I would ask them when they were collecting the New London tickets if they knew which doors would open at Mystic.
A good general guess is one of the cafe car doors—they seem to be popular for some reason.
AmtrakBlue and I posted at the same time. She is an extremely knowledgeable traveler, so I would take her advice about the cafe car.