I've no problem with using LibreOffice for most of my document needs, but i haven't found a good substitute for microsoft's OneNote yet. I mainly use it to plan my RPG games and it helps a lot. What alternatives are there for organizing notes on linux, with similar features to those that OneNote provides?
I was asking a similar question a few months ago, and my search turned up Joplin. It's a free, open source app that works across multiple platforms and can sync data through a cloud service, either through Joplin's own cloud storage or through a third-party cloud storage like Dropbox.
https://joplinapp.org/