I tend to use Obsidian these days along with the excalidraw plugin (if you just want to try excalidraw without installing Obsidian: https://excalidraw.com/)
Obsidian is probably a nice tool, but I'd like to have my rigid grid. Graphs are ok, but I don't like how inexact they are.
I'd like just to type, and click switching between cells.
The other thing that popped into my head is maybe a Kanban tool (that would be a grid). You could do a quick paper prototype that easily with some postit notes on the wall to see if it works :).