Just put that sentence on your site.
It would also be helpful to see "class sizes" for a given course. I don't want to sign up only to find after the fact that nobody is taking the same course as me.
Having class sizes is a great idea. I'll have to look into adding that.
Works with Coursera, EdX, Udacity, The Great Courses, and Udemy courses.
I'd actually recommend changing the tagline on the site, as well, to be more clear: "Find the perfect study buddy for all your Coursera, EdX, and Udacity courses."
Guest access would be a bit hard, but definitely doable as well.
The main webpage is possibly too minimal. While minimalism is nice, as it sits currently, it gives the appearance of "not done yet". I would recommend adding more explanation about what a user would expect, maybe some screenshots, user reviews, etc.
It likely feels trivial as the creator but keep in mind that you know a lot more about your service (and your vision) than your users do. The goal of your landing page should be to bridge that gap. This all needs to be done without adding any extra work for your users (including filling out forms).
Hopefully that helps a bit?
It's just a trust issue, not in particular with you, but if I come across a website that wants my email address but doesn't clarify what if offers in return, I'm hesitant in giving up that information.
Also it is not clear to me, if my full name would be shared with other users of that page. I certainly don't want my new employer to know that I'm looking for a study buddy for "Java 101" right after accepting that offer for a senior position :)