Build a Learning Management system with quiz, mockup tests, offline courses etc

So, i am looking for a learning management system to be built which will have features like quiz, mocktests, offline courses, course calender, shop, team learning etc. The srs is attached below, please go through that, i need all those features to be fulfilled.
Here is the SRS - https://docs.google.com/document/d/1yu-vAuHPIlVtWGTfPPVu07LkEvZG69u-RyPHGglhaMA/edit?usp=sharing
UI - xd files will be provided from my side.
Tech Stack : React Js, Node JS
* Please check the srs clearly and come up with timeline.