There are some ways to set up Sedna, depends on your use case:
If you have none Kubernetes environment and don't want to install Kubernetes manually, you can follow the instruction to install all-in-one Sedna environment.
Otherwise, when Kubernetes is ready, you can follow this instruction to install Sedna on the existing Kubernetes cluster.
One more thing: we also have a local-up install script available for easier Sedna development. The local-up version boots a local Kubernetes cluster and installs Sedna based on a local repository. The use case and setup procedures are available here.
After set up Sedna, you can try out examples.