I recommend checking your inbox for an email from the school or district. The email will have the detailed instructions and the link to the enrollment form. Once you select the link, you will be directed to the login page where you will be prompted to provide either your email address and password or your username and password. Once you successfully log in, you should be able to access the form.
If you have not received the details to enroll your student, I recommend reaching out to your school or district for assistance.