I’d like to explain Kubernetes (often simplified to K8s, or K8 by people that are wrong).
Kubernetes is simply a set of tools to turn (in real time) the contents of an etcd cluster into real things.
Kinds of things are represented by resource definitions. You add resources according to those definitions to etcd. Controllers provision those resources into reality.
It’s not that hard if you break it down. What you can do with it may be complex, but that’s a choice teams make for themselves.