This video Link is to a 6 video series of someone that actually cruised on a German cruise ship in August 2020. It might be a good indicator of what we can expect when cruising starts back in America.
https://www.youtube.com/watch?v=EuT10fRWEgs&list=PLZU7lBfJXxcSVbAXWzVPcI4LdfUXUUnxq&index=1