Is there a step-by-step guide how to set up picoCMS in nextcloud (17)

When I enable the app nothing appears. The sentence “and create your first personal website using the “sample_pico” template” is of no help.
What does “create” mean in the context of nextcloud?
…using template… where is this templat and what action is ment with “using”?

See Pico CMS for Nextcloud v1.0.0 is out now