In order to register and enroll in Wikipedia, you must first create an account. To do this, click on the “Create account” link on the main page. This will take you to a page where you will need to enter your username, password, and email address. Once you have entered this information, click on the “Create account” button.
Once you have created your account, you can then begin the enrollment process. To do this, click on the “Enroll” link on the main page. This will take you to a page where you will need to enter your username and password. Once you have entered this information, click on the “Enroll” button.
Resource: https://wikieditors.net/how-to-register-and-enroll-in-wikipedia/