I use a rental agreement only when I'm renting longer-term on my own. But many hosts include specific terms from their standard rental agreements in their House Rules on Airbnb. Airbnb requires guests to read and promise to adhere to those rules, so if there's anything not in the standard terms of service that is specific to your rental or location, make sure you include them there.
Since you're new, I'd recommend reading through a lot of the help for hosts that Airbnb has available on its website. In particular, understanding the terms under which you are offering your home and all the details of payment is very important.