I'm starting a project along with my siblings to scan all of the family negatives, slides, and photos in an effort to preserve them.

I currently have Immich as well as Nextcloud Memories internally. That said, neither seem to be ideally suited to this task. I'm looking for a solution that would allow all siblings the option to view and upload scanned pics to the same library as we work through the shoeboxes full of memories. While Immich and Nextcloud both have account support, I can't seem to find a way to share a library amongst all accounts.

Does anyone have any recommendations for this project? I would then backup the scanned pictures on my server as well as B2 storage for redundancy and each sibling should have the option to download and backup the same library however they see fit.

I'm running an Unraid server as well as NextcloudPi on a Pi4. I also have two very basic VPSes that I rent.

I've looked at both ente.io and PiWiGo, but am currently having trouble getting either to work (still learning this selfhost stuff). I'd like to know if anyone has used either in this type of capacity before I spend more time trying to figure out what I'm doing wrong.