@Jody35 Have you looked into the Help Center for answers to your questions? If you select Help and then enter key search terms you can bring up articles that will address your questions. In my experience, I sometimes have to try different search terms, but meanwhile I am becoming educated about this platform.
I think the host forum is most useful in the "grey" areas where it is not clear about how some action by the host will impact the listing.
Just to get you started with the Help Center, here is the link to the article about adding cleaning fee.
https://www.airbnb.com/help/article/58/how-do-i-add-a-cleaning-fee-to-my-listing