Hello @Sienna2,
Depending on what tyoe of account it is, Airbnb may deposit a small amount of about 0.01 to your account to check that the transaction is accepted. If it is accepted then Airbnb will take a few more days to validate the account in their system.
When that happens the status of your payout method will change to "Ready".
You don't have to do anything.
My payout method is my bank account. When I added it it took about 5 business days for the status to say "Ready".
If it doesn't go to ready for you in a week you should contact Airbnb support.
Steve.