@Renee541 As a new host, I would advise you not to take long term bookings. Set your max stay to 2 weeks or so until you get everything set right and learns the ins and outs of it all.
I woukd never take long term bookings through Airbnb at all. There are none of the safeguards landlords normally employ with tenants. And make no mistake- a guest who stays a month or more is no longer a guest, they are considered a tenant by law in most jurisdictions. And Airbnb will not assist you in evicting them if they prove objectionable or fail to pay subsequent months.
Also, it says your flat is a basement apartment. You should make it clear in your info who lives upstairs.