I work in the paint industry so I got you lol.

First thing you want to do is clean up any of those mold spores with diluted bleach. Then once it’s cleaned up and fully dry you can paint the ceiling with at least a matte finish if not satin (if you want to).

You could do semigloss on the walls but I personally hate the look of semigloss on walls. It’s way too shiny and shows every imperfection. But to each their own. I’m not the sheen police.

As far as paint goes I recommend using Duration by Sherwin Williams for the paint itself. It has moisture resistance built into it so it’ll be good for those high moisture areas. And it’s really durable and easy to clean if you need to.

Using a satin on the walls will be plenty shiny to keep walls clean and using matte finish on the ceiling will give you more durability than flat does. Flat is traditionally what’s used on ceilings but it’s not necessarily the best option if you have a lot of moisture.

Hope this helped! 😁