French gov's open source alternative to Notion or Outline

Does it actually replace notion? From reading the page it sounds more like just collaborative docs a-la gdocs rather than a collaborative database, right? With notion I can use or build templates, have databases with relationships to each other, etc. Can it do that kind of stuff too? Notion does fail me regularly due to the business model, I basically never need any paid functions until I start inviting collaborators and then you quickly hit paywalls. I'd love to replace it with something open source, my use case is small to medium scale preproduction/project management for short films, commercials etc.

I also see this is self hosted, never did that before and not sure what it entails but I'm willing to learn!