Congratulations on getting the DNA test done, Kevin. You don't actually download your DNA to WikiTree. But you will want your test number here for your cousins.
On your Profile, hover over Abernathy-2228, and you will see DNA. I would ask you to please click on that.
This is the page where you will enter the 23and me information.
However, in order to help you, I am going to give you a link: How to get started with DNA. This should give answer all of your questions. If you have any other questions, you can come back to this forum and ask again, or you can contact me directly.
Good luck finding your cousins on WikiTree.