This is a 2 part design based on this build from parts not included. I recommend using this guide in conjunction with this thing page.

https://www.partsnotincluded.com/diy-stream-deck-mini-macro-keyboard/

Pro Micro: https://www.amazon.com/SparkFun-Qwiic-Pro-Micro-microcontroller/dp/B084KPT7MH/ref=sr_1_12?dchild=1&keywords=pro+micro&qid=1614174969&sr=8-12

Cherry Switches: https://www.amazon.com/Cherry-switches-MX1AG1NN-Mechanical-Keyboard/dp/B07RQTNS58/ref=sr_1_6?dchild=1&keywords=cherry+mx+switches&qid=1614175093&sr=8-6

The wiring diagram is attached in the thing photos

The only difference between the code in the partsnotincluded page and this project is you'll need to add a 9th key and F21 in the code

I've included my code in the page