You can find more details on how to configure eLearning App in this course
https://www.odoo.com/slides/elearning-56
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Update to Answer :
On your database, there are certain functionalities you can activate from Settings > eLearning.
1. 'Certification' is one of them, it is designed on the survey model. Once activated you can manage from eLearning app
2. If you enable 'forums', you would be able to manage Ranks, badges etc from Website App > Configuration
Courses, contents, quizzes & certifications can be managed from eLearning App > courses. The web front end can be configured by clicking Edit from the website.