Which type of database would be most suitable for the following application? Give a detailed justification why and create an appropriate database schema for the app.

Online learning platform web application features

$-$ Users will be able to create and log into accounts as students or teachers $($with different permissions$)$

$-$ A home page will show relevant course information, upcoming deadlines, status updates, and more. These home pages must be discoverable and visible to other users

$-$ Students will be able to post status updates to their home pages

$-$ Students will be able to leave feedback for courses

$-$ Teachers will be able to search for students or other teachers

$-$ Teachers will be able to create or delete courses and upload course material $($e$.$g$.$ images, pdf$,$ etc.$)$

$-$ Teachers will be able to see all of their courses and the students enrolled in them

$-$ Students will be able to see a list of available courses and enrol in them

$-$ Users will be able to chat in real time with instant messaging