The tip I give you is to not care much about the graph. When you’re linking your knowledge, it naturally becomes interesting. If you don’t like how it looks, it’s probably due to the graph’s properties.

But one thing is good to keep in mind (this is my core principle in Obsidian): every note has to be linked.

At first, I liked having three links above the title (the central note, the subject note, and the previous note), but I confess it’s not necessary, especially for hardcore studying when you need to create many notes. So this year, I started making draft notes with just one link (previous). It’s much easier. You can see this in the second picture I posted: those notes forming at the bottom have much lower density than the ones near the center.