@Melanie116,
Airbnb doesn't provide insurance coverage for hosts. You will need to obtain business liability insurance on your own. Depending upon what type of experience you are planning to provide, you can check with your home owner's insurance to see if they will cover you, or if they provide a rider to the policy that you have. After that, I would recommend doing a Google search for business liability insurance to which providers are available in your area.
When I used to live in the Bay Area, and was a consultant, I had a business liability policy with The Hartford.