There is no need to worry. We usually hold a welcome party when a new tenant comes to the house.
You may feel a bit nervous at the beginning, but you will surely get used to the environment as you talk with your housemates everyday and interact through various kinds of events.
At the same time, we consider etiquette when living together is very important. Each room has a lock and you will have your own time. It’s up to you how you enjoy life here. So why not try to make the most of this environment?