I finished the schematics and PCB Board layout!

I ended up slightly tweaking my plan for the layout. On the top left corner, I am adding the ESC button, so I will only have one key for space.

The matrix wiring for the schematic wasn’t too difficult, but the main issue for me was the PCB copper routing. It was easy to connect between the keys, but when connecting the rows and the columns to the microcontroller, I ran into trouble making it work with only 2 layers. I went back to the schematic multiple times to switch connections so that the copper routing wouldn’t intersect.

The final PCB board looks so cool! Designing the case will be fun as I have a good deal of CAD experience.