Best Approach Sharepoint Lists

cschonhaut  another option is to create a Team from an existing Team, when you do this, you can choose which items from an existing Team you want included, https://support.office.com/en-us/article/Create-a-team-from-an-existing-team-f41a759b-3101-4af6-93bd-6aba0e5d7635. 

Planner Plans include the ability to assign Tasks to people so you may want to use this instead of SPO lists. 

The choice of tool(s) depends on the requirements, which frequently change and/or are incomplete so I don't recommend trying to get everything all figured out in advance. Do some pilot projects and get a lot of different people involved to get multiple perspectives. The tools change frequently as new features are added, so try not to get overly committed to one approach.