I felt the same way, even after browsing around on the website, and somehow I got to https://mojolang.org/docs/manual/quickstart/, which brings you to mojolang.org instead, which is the real website of the language it seems, instead of "Modular" which I guess is the business.

https://mojolang.org is a lot better as a introduction to the language for a programmer, at least for me, compared to whatever I could find on the modular.com website.