i'm working on this idea, too. lol. just posted it this morning:

https://linkedli.st/

hey, this looks amazing.

This has been my COVID side-project.

The ultimate goal is to make it easy to find learning materials that are at the exact right level of difficulty for a person. Not so easy that you don't learn anything, and not so hard that you get discouraged.

Comments/questions/suggestions welcomed. And thanks for taking a look!