I would argue that its rare for education to make you smarter, it mostly makes you more knowlegable.
Knowledge is mostly free though. You can get it from the internet, from the library etc. A lot of what you are paying for is the certification - some places let you just sit the exam I think.
It's a voice chat server. That's all it does.
You can't post images, GIFs etc.Fine for if you just need voice, but good luck getting people away from discord.
(Used it for WoW before discord)