is icloud the solution for me to back up all my images, videos, documents, etc from all my devices for my entire family?
It's one of many solutions.
Back up and restore your iPhone, iPad, or iPod touch using iCloud or iTunes
A Guide to Family Sharing - iCloud - Apple Developer
Creating an iCloud account- Frequently Asked Questions
Apple - iCloud - Learn how to set up iCloud on all your devices.
Should I use iTunes or iCloud to back up my iOS device?
is icloud the solution for me to back up all my images, videos, documents, etc from all my devices for my entire family?
What kind of devices are you asking about? iCloud can backup your mobile devices, but not your Macs. On your Mac, iCloud is meant for syncing your documents between for devices and for sharing documents. The easiest way to backup your Macs is to set up Time Machine and to backup to local disks. This way, your backups are readily available, when you need them most, and you do not depend on a network connection, to restore terabytes of data from a cloud service.
iCloud
