Docker is really easy. A few lines to describe your environment and a handful of commands (docker build, run, ps, images) and you are up and running.

Orchestration is more complex, but not too bad if you are using a managed platform.

A few days and you can get your head around it enough to get started with huge payback in efficiency.

After that, you can spend years really going deep on K8s and fully containerised stacks, but that’s more for DevOps/Cloud engineers rather than Devs.