Can be easily done in the ADM portal, Access Control. Create "Shared Folders" for all the household (you can also make use of the default "Public" to allow access to all users), then create individual ones for each of your family members. You can also create shared folders for collaboration between groups/users. Just give them specific access as needed.
There's many online tutorials like
https://www.youtube.com/watch?v=iQ-Aka6XktQ. If you were to hire someone like me, you'll need to provide that individual with sufficient admin access to manage your setup.