I would go with OpenMediaVault (https://www.openmediavault.org/) (it's a Debian based package, which seems to be user-friendly). FreeNAS seems to be a bit overkill for the tasks. I would definitely use SSD, with RAID 1 (redundancy). SSD is relatively cheap, so I would start at least at 4TB. While I would definitely have a NAS at home, I would also look for a cloud solution.

Cheers!