Request: Collab tool to share ideas with family members

I'm interested in recommendations for apps to share ideas, links, screenshots, text,... with my wife.

Use cases: sharing possible vacation spots, things we need to buy for our kid, interesting articles about specific topics, useful links regarding a project we're both working on and so on.

Currently it's all cluttered in text messages.

I've looked into

• Nextcloud Deck
• Trello (my current top pick)
• ClickUp
• Notion

and a few others but most of these tools are geared towards project management while I'm looking for something more versatile/"creative".

Here is what I need:

• Android and Windows Client or preferably Webapp
• Easy sharing from Android and browser
• Possibility to create different workspaces/topics/channels
• Decent and simple UI
• FOSS is a plus
• Doesn't have to bee free
• Not selfhosted

Thanks everybody!