Rancher 1 is extremely easy to learn. Generally you do everything from the UI (I only use the CLI to view combined logs). High-availability is easy too; they provide a load-balancer (haproxy) with good UI integration.

Rancher 2 has a nicer UI and is more tightly related to Kubernetes. But there are moreorless zero docs, so be careful.

With either version: it's trivial to grab the master and node Docker images, and deploy them to your local machine to have a play.