Hi @Christian3882,
I am fairly new too (actually i am not new, but have not been hosting for years so i am a bit rusty), but the way i set it up at the moment is that i made the cleaning person a co-host - you can set different levels of access: view only up to full access, pretty much.
that way they are always in the loop with the booking schedule. Also we have both synced calendars with iCal (that is if you are on iOs, but comparable one on other operating systems) and that way you have free days, reserved days and confirmed days all available on you calendar of choice - and that goes for anyone else you might need to keep informed too.
Maybe there are better ways to manage it, but at the moment these two are working well for me.
As for laundry, there are services that manage everything laundry-wise, some even let you rent out linens and towels, kind of a pay-as-you-go service, but i am not sure what is happening in Venice (though you surely are pretty tourist savvy in the city, so there'll be plenty options available).
For my island rental, the cleaning lady stores all linen, towels etc in her home, brings in clean ones and takes home stuff to be washed and just charges me per wash.
hope this helps!
C