A Course platform that allows you to sell your courses per course content or section

Hi,

First of all I'm new here so I don't know whether this is the right place or not to share my product idea and so sorry for my english.

So, I am planning to create a course platform like https://teachable.com but my platform allows course creators to sell their courses per course's content or section and also they will be able to sell their courses as a whole.

Everyone cannot pay/does not want to pay more money for a course because of budget or anything else. Hence,  I think selling courses by separating sections or per video/content will increase sales instead of selling as whole.

I am not sure that it is a correct approach or not so I need your suggestions/feedback. You know that better than me. Please share your thoughts.

Thank you so much for your time! 🙏