In our cloud, you find the Collectives app (to be found behind the star with »C« in the app menu on top). This app attempts to support activist and community projects with organizing.
In Collectives you can work collaboratively on documents, link them among each other and maintain templates for subpages - e.g. a template for meeting notes or for reflecting actions.
Ultimatively, the Collectives app combines the basic functions of a wiki (including full text search and backlinks) with a modern user interface and collaborative editing - as known from pads.
The documentation of Nextcloud Collectives can be found here.
If using the cloud as group, there's the problem which user the shared data (documents, calendars, deck boards, …) belong to. Therefore we strongly recommend to use Nextcloud Circles for groups:
If you follow the above workflow, you later can easily add/remove members from your group Circle. You don't have to share all objects again each time a new member joins your group. Also, you can spread the administration of your admin account among several team members and easily pass it on once the initial admins become inactive.