The first thing you start with on k8 is a Deployment. This will cover Container Scheduling, Replication, Orchestration on available Nodes, Secrets and volume bindings.

By just following this one tutorial (https://kubernetes.io/docs/tutorials/kubernetes-basics/deplo...), you already cover everything you used to do using docker-compose.

Now what ? You are going to learn about Services (https://kubernetes.io/docs/tutorials/kubernetes-basics/expos...), Ingresses (https://kubernetes.io/docs/concepts/services-networking/ingr...), Ingress-Controllers (https://kubernetes.io/docs/concepts/services-networking/ingr...), Persistent Volumes (https://kubernetes.io/docs/concepts/storage/persistent-volum...), Configuration, Pod Lifecycle, RBAC, Rolling Upgrades, Operator Pattern, ...

This is not about orchestrating containers anymore, it's a mix of network, configuration, storage APIs that just reunite everything you used to do with shell scripts under a fully declarative format. Then you realize, the _ACTUAL_ value of kubernetes isn't about the containers it can start-up, it's about being able to _MOVE_ those containers, their HTTP routing rules, their database, their backup schedule, their secrets, their configuration and everything else on totally different machines with different OS and different topology, just by running a kubectl apply.