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've tried Joplin, Logseq, and Obsidian. The best one was Obsidian but it's not FOSS and is getting bloated over time.
I'm settling on zk now. This small command line utility solves almost all of the note managing needs for me.
Double links and tags make me forget about these "infinite free board" functionalities in OneNote: turns out they tend to be used inefficiently. Graphical sketches can be embedded in markdown or linked to a drawn picture.
The best thing about zk is that its notes consist of plain text and no extra tracking data is required outside of the file (unlike any others above), which means it's absolutely free to pair it with / move on to other tools when needed, or working temporarily without the support of it.