Depending on your needs and how technical you are, Emacs and org-roam might work for you. It’s what I use. But my notes are strictly text, so I’m not sure how good image support is if that’s something you need.

Is it legal in the US to shoot people who are trying to kidnap you?

I mean, anyone can go around claiming to be law enforcement or ICE or whatever, but with no badge or ID, how are people supposed to know that this isn’t a gang trying to trafic them?