Take pictures documenting the damage and provide receipts for anything you can - the more documentation the better!
Go to the resolution center and open a ticket for the amount of damages.
https://www.airbnb.com/resolutions/
Because you don't have a security deposit, payment will rely on the good graces of your guest accepting responsibility for damages, or Airbnb allowing you to claim under the Host Guarantee. Neither of these are as reliable as claiming against a security deposit, so think about adding that for future bookings.
Be sure to initiate this claim within 14 days or before your next guests check in.
https://www.airbnb.com/help/article/361/how-do-i-submit-a-host-guarantee-payment-request