Which apps allow to easily share lists (like shopping lists) between people?

Hello, I am looking for some apps to share my grocery lists with other people. For the moment, I use Langis (Signal) with a dedicated thread but this not satisfying as no one can “check” the items one buys. I have installed many of the shopping lists apps available on F-droid but I don’t understand how I can share my list. The topic do you know any good shopping list apps, suggested some solutions but I am clueless… I have the same issue with some todo apps but this is something else. Maybe I will post another message, if needed. Syncthing, Nextcloud, Docker Web App,… I don’t know how all of these solutions work. Do you know where I can find some kind of tutorial that explains all the basics ? Thanks for your advice !