Hello @Nana13,
You can price it any way you like. When you look at pricing settings, there will be a base rate for you to set. Depending on how you want to do it, that can be for the first person, or for a bigger group. Then you can set an additional proce per person beyond that number of people.
I have a small room available, and I have set the base rate for one person. I can accomodate an additional person in the room if need be, and I have set an additional fee for the second person.
I have another very big room that can sleep five quite easily. My base rate on that one is for the first three, and then I have an additional fee per person beyond that.
I would suggest you set your base rate for the number of people you expect to be using the place most often.