I'm trying to build an educational social platform with a lot of functionality in it, and i was wondering if Wordpress is the best choice for that?
Wordpress is the most popular CMS platform in the world and can easily be modified into a LMS platform.
However, the most popular and suggested "native" LMS platforms are Moodle and Talent LMS
It is hard to tell which is the optimal for you since you haven't mentioned any requirements. I think you should compare the options of all the listed platforms and decide by yourself.