@Francisca16 Airbnb are blocking your calendar when you get a booking because you have your two bedrooms and living room with sofa bed on one listing.
If you want to be able to let each bedroom separately, you need to have 3 listings, one for each bedroom and one for the living room.
You would have to say in your other listings that the guests don't have the use of a living room.
In answer to your current guest enquiry, you can tell them that they can book one room for 4 months and their two relatives can book the other one for 2 weeks (once you have it set up in its own listing).
Your listing is for a Private Room, so you tell them that they won't have the whole apartment to themselves. You can say that you live there (as I assume you do) and that they have the use of the kitchen.
If you have bookings for each bedroom, and you thought the apartment might be a bit full, you could always block the dates on the living room listing, so that you could all use the living room. But that is your choice.
I would recommend that you don't accept long stays like 4 months until you are more used to Airbnb as it's a long time to have guests who may not be as suitable as you hoped. When you have more experience, you will know what questions to ask long term guests and you will have gradually added to your House Rules in order to ensure that their behaviour fits in with your lifestyle.
