I used also just one notebook and wrote everything down randomly with a lot of arrows and numbers/symbols referencing each other, but it was impossible to use t

I used also just one notebook and wrote everything down randomly with a lot of arrows and numbers/symbols referencing each other, but it was impossible to use the notes for learning. So I switched to multiple notebooks, it helped somewhat. Our way of notetaking is just write-only. But I'm trying to improve it.