How do you organise your Worldbuilding notes?

So far I've just been using a word document and writing literally everything into that, it's so disorganisation. Plus, I have art and comics that aren't even in the document, just floating around on my PC. I want to organise my notes to make them easy to read, and all in one place.

I was thinking of making a One Note or Trello board. I use One Note for art inspiration, and i have to say that I find it a bit annoying, i think moving pictures around with it a bit fiddly. I was thinking of something like characters in one colour, events in another, and locations in a third or something. And then connecting different things with lines. Or maybe even a time line. But if you have a different idea, I'm all ears.