Zend certified PHP/Magento developer

Easiest way to create a custom keystroke hotkey on a Mac?

I feel like I’m in a bit over my head here. All I want is to change it so that when I press a key on my mac (CapsLock) or perhaps F12, instead of doing what it was originally mapped to do, it inputs a keystroke (Ctrl + Option + S). This would make work a lot easier. Why is this so hard to figure out how to do?

I installed one of the many suggested apps I found during my research, Karabiner, and I thought mapping a keystroke like this would be as simple as selecting the key, and choosing which keys I want it to input instead. Turns out, in order to create a complex modifier, I need to know how to edit JSON files which is totally out of my scope. Even the web based generator is largely impossible to understand for a layman, and there’s little to no documentation on how to actually use it: https://genesy.github.io/karabiner-complex-rules-generator/

Appreciate any tips on this.