Apple ID and family sharing
Hi Can I set up individual apple IDs and then link with family sharing without losing data> Can we share one ICloud account?
Question marked as
Yes, you can do what you want if, by "share one ICloud account," you mean share an iCloud storage plan. See these basic documents on family sharing.
Family Sharing - Apple Support
Set up Family Sharing – Apple Support
Share an iCloud storage plan with your family - Apple Support