IMO, it would be easier to use a more feature-complete password manager like Bitwarden. Then all your non-technical family members can use it like a commercial

IMO, it would be easier to use a more feature-complete password manager like Bitwarden. Then all your non-technical family members can use it like a commercial app while you can Use the CLI or whatever open source tool you want to interact with it. In my opinion, encryption inside git repositories is an anti-pattern that usually results in headaches.