Here’s a non-paywalled link to an article published in the Washington Post a few days ago. It’s great to see this kind of thing getting some mainstream attention. Young children have not made an informed decision about whether they want their photos posted online.
Syncthing!
Android Phone/Linux/Windows/Mac/iOS clients. Simply sync your photos to all of your devices, if you only have the one device, use a trusted friend and cross sync…
Don’t bother with cloud.
Also Signal groups for sharing with those that matter.