How to publish guest post on edu platforms?

Canvas. Edu sites use canvas platform to provide courses to students. In canvas platform there is an eportfolio section in which users can publish article.
So i saw many people creating edu guest post on these universities sites so i want to know the method how to create canvas account on these American universities and publish edu guest post if it is paid i can pay you so i want to know the method thanks.

I'd normally not reply to this post since I don't know shit about what you're asking, but nobody had replied, so... here's a question to get this going: don't those students (that post the articles) post a link to their contact details / profile / whatever when they submit an article? Because if they do, just contact them via their profile pages and straightup ask them if they can publish your content and for how much!

Or, maybe contact some SEO agencies that you trust / know they have this service and ask them for a quote?

They have inner pages , and need EDU mail to verify and create account onto it !

normally student sell their email and account details so i want to know how i can get it ? to create my own account or handle to post my self.