Apple - How can I reprogram OSX to use Windows-style shortcuts for all operations?

The answer to my question is to use Karabiner along with their set of complex key modifications titled "PC-Style Shortcuts". You can also add modifications of your own by editing the ~/.config/karabiner/karabiner.json file.

The only shortcut I couldn't get working is using Alt+Shift to switch between input languages, but it's probably doable using more advanced scripting.