I would recommend to take any udemy couses like "Kubernetes Certified Application Developer (CKAD) with Tests" which provide overall knowledge on Kubernetes with excellent animation with expert explanation for quick start.

In my opinion the understanding would be better with hands-on tests.

Plan A. For pure Kubernetes start with minikube:

minikube start

Plan B. For Openshift flavour of Kubernetes start with OKD:

oc cluster up

The simplest way would be to create a cluster using minikube.

Minikube can launch kubernetes locally , here is the official documentation , that explain how to do it: https://kubernetes.io/docs/setup/learning-environment/minikube/

If this is just for learning purpose , you could also use the Playground in katacoda, it will spin up a cluster for you , and it's a great way to learn : https://www.katacoda.com/

cheers!