You do not need to complete your profile before starting courses. Here is how to sign up for courses: https://www.classcentral.com/help/faq-how-enroll
If you complete a course in the Class Central catalog, you can select the Mark complete button on the course information page (e.g. one like this), which will add the course to your profile.
You can personalize your Class Central account by following subjects, providers, and institutions, create lists, add an image and bio. Your image should be smaller than 1MB.
Keep track of your education by marking courses as complete and adding other education such as high school, degrees, or courses and resources not currently listed in the Class Central catalog.
To add entries to your profile, go to Your Profile in the drop-down list when you hover over the icon at the top right when you are signed into Class Central. Then click Edit your profile and Add new entry.
You can add a Section or Degree (or high school) to your Profile without a link. Simply type the information in. All other types of entries require a link or URL (page internet address). More details here.
After completing the steps in the Getting Started tab, you can select your own User Handle and the Getting Started tab will disappear.
You do not need to complete all steps before starting courses.