Hello @Tiziana152,
Yes, make two listings ofor the same property. One will be your existing listing, which state "Private room in house" and the new one will be "Entire place".
So create a new listing for the same place but have it set as "Entire place".
If you wish to allow rental of only the entire place while away you must:
1) block your away dates on your existing private room listing
2) block all dates on your new listing except the ones on which you'll be away. Do this by setting its availability to "Dates unavailable by default" and then manually unblocking the dates on which you'll be away.
If you wish to allow the possibility of either being rented while you're away you'll have to remove instant book from your existing listing and set the entire place one to "Request to book". Then synchronise the calanders.
The article below explains multiple listings and synchronising calendars.
https://www.airbnb.ie/help/article/289
Steve.