Hello @Andreas359,
When you register a payout method, be that PayPal, bank transfer etc., the status says "Pending" until Airbnb has verified that the account is useable. In most cases they pay out a small amount to check that the transaction went through. If that's successful they then take a few days to complete their own internal side of the process.
So, you don't need to do anything more. The status should change to "Ready" in a few days and the account will then be ready for use by Airbnb to pay you. When this happens make sure to check that it's the default method like you say you want. If it's not, click on the "Options" button next to the PayPal account and select the option to make it the default method.
Steve.
