Keep us updated on how he is doing. Just keep him clean and flies off of him if you have them already, they will get into a wound and lay eggs and then he’ll have maggots. Not something you want to be dealing with.
Boy I bet that hurt the alcohol. Betadine would have been good or salty water. Soap an water. But as long as you washed it. Did you look around for anything that had blood on it? Sure don’t want another stepping on what ever it was. @casportpony is a good one for wound care and antibiotics...
You could try putting a bandage on keep him out of water on clean bedding keep it clean unless you can get vet care I don’t think there is anything other than keeping it clean and medicated ointment on it. Only big problem would be infection setting in sepsis spreading . Do you have any...