The best way to learn is by doing
I've been using KodeKloud for a while. The range of courses for DevOps, plus their hands-on labs and playgrounds are for me what makes the membership worth it. Many other sites offer just videos and test your knowledge with multiple-choice questions. This doesn't work for me, I need to practice things by doing, and sometimes I find it inconvenient to set up environments for each thing, sometimes I just want to have that ready without any hassle. KodeKloud offers that and more, it's not only the labs but also the content of the lectures, they have such good quality and are up to date with the newer versions of the products you are learning. Their Slack workspace has a very active and helpful community too, that will support you through your journeys. It was all this that helped me study and practice to do the CKAD, which I aced with 91/100. Thanks so much, KodeKloud!!