Thanks to Christophe Fiessinger I was attended to a training course for Office 365 Groups. Hereby the description:
Do you need to organize and work with a team on a project? In this tutorial, learn how to use Office 365 Groups to find and share information with conversations, share and collaborate on team files, share milestones and schedules on the team calendar, and add new members so they can get caught up with the team.
Click here to view the materials.