I like the hands-on tutorials of Instruqt: https://instruqt.com/public/topics/getting-started-with-kubernetes https://instruqt.com/public/topics/getting-started

I like the hands-on tutorials of Instruqt: https://instruqt.com/public/topics/getting-started-with-kubernetes https://instruqt.com/public/topics/getting-started-with-kube.... They also got quite a few on Knative. Disclaimer: I worked for Instruqt and created some of these tutorials.