By chance I used this just a few weeks ago when I started learning to play Go. It's a pretty good resource!

Personally, my favorite tutorial I went through was The Interactive Way to Go (https://way-to-go.gitlab.io)

Also notable is Sensei's Library (https://senseis.xmp.net) which is a very old and unbelievably thorough wiki on everything Go. It's a cool place to browse even if you don't play.