Hi @Susie27
If the guest cannot book it is most likely an issue on their part and recommend that they call Airbnb. Do not contact them outside the Airbnb platform. There have been "guests" targeting new Airbnb hosts with fraud.
Looking at your listing, which is very nice with beautiful views, I would add more defined House Rules like instructions about your guest’s visitors, common space, and how you would like guest to clean up the common areas. I would be careful with the statement that you are not home that often. In the beginning it is better to let guests believe you are going to be around.
Also, you have instant book on. I think all of us that have some experience with hosting would recommend that you have a few guests before you use instant book. Your best education other than reading all the links Airbnb provides on their site is to go to the Community Center and read about all the host’s issues especially pertaining to guests. It is eye opening and will help you be the host you want to be.
I know I did not really answer your question but really do not want to see you being taken advantage of.
Best of luck with the Airbnb Hosting experience!!