

For notes, I have moved to Joplin with the option to synchronize my data using a WebDAV server. It works really well, and it has both a mobile and desktop app. If you’re interested in developing your project, maybe you can have a look at the options this provides. For example, I really like the ability to separate notes between groups, assign tags, create drawings, and the possibility to use Markdown.
Good luck with your projects! To mirror @enemenemu’s suggestion, I would also look into collaborating with the people trying to push the EU Docs alternative. Not sure if that will work, but it’s worth a shot if you’re interested :D
It was just announced that the EU is pausing sustainability requirements on smaller business (< 500 employees) for 2 years. This stems from fears related to the trade war, as they want to keep smaller businesses competitive. Nevertheless, I’m pretty sure that this won’t be great for the environment.