elearning app

I want to build a website and ios, android app for e-learning business. The development can be in hybrid. The structure will be somewhat similar to teachable.com
Admin should be able to create courses, create lectures and upload the video content. (Video content can hosted at third party), sell the content to customer for a fixed period of time, view reports.
Customers can register to this courses, view the content but can’t download it. There will be more such small functions similar to teachable.com