I think the two systems you need to know are: 1) https://orgmode.org https://orgmode.org 2) https://roamresearch.com/ https://roamresearch.com/ Combine those

I think the two systems you need to know are: 1) https://orgmode.org https://orgmode.org 2) https://roamresearch.com/ https://roamresearch.com/ Combine those two and you get org-roam