how does rush work?

Hi! I’m from the class of 2022 and I’m kinda wondering about how rush works.
1. Do you have to rank the sororities in the order you want? I don’t really know much about each so I don’t really want to do that upfront.
2. Is it possible to not receive a “home”?
3. Is it possible to have multiple houses want you, and have you decide which in the end?
4. How many days will we be able to spend getting to know the girls from each house?
5. How much time do you put in per week for Greek life?
6. How much does Greek life cost? Does it cost to rush?
7. Any other information is welcome!

Thank you for your time! Cheers!