Hello @Ruth357,
In the same way that you added listings for the rooms you can add a listing for the whole house to your profile.
Just click on "Add listing" when you log in to your account. That listing will then have to be set as "Entire place" type.
So as not to have double bookings you should turn off instant book on the room and the whole house listings. You should also link each room listing's calendar and the whole house listing's calendar.
I suggest turning off instant book until you see if the calendar synch is working. Note though that there may always be some delay in the synchronisation.
The article below has information on setting up multiple listings and synchronising their calendars.
https://www.airbnb.com/help/article/289
Steve.