Rome when the Pope passes

Please forgive any insensitivity in this question, I’m purely curious and trying to game plan.

I have a Rome trip booked in the near future, including Vatican City tour. With the Pope’s health, and not wishing anything negative to happen, but he is quite old and on a ventilator.. If the worst case occurs, what is it like in Rome?

Has anyone on here experienced Rome during or shortly after the passing of a Pope? Are pilgrims to the Vatican coming in advance to be there or pray before? Are there Masses that begin in the square? If/when it happens, do huge crowds flock to Rome?

Again, sorry for any insensitivity, we wish him healing and a quick recovery- but as a non catholic and visitor, I’m looking to understand a bit more of how this will look for the city if he passes.