Thanks! I'm also on an XPS 13, and also an ex-Mac user who misses the trackpad stuff, so I know how you feel. Not only knowing commands but especially playing with dbus is unfortunately something for very advanced users only, so my idea was to build some sort of "DB" for common dbus commands that act on DEs, say, to open Budgie Desktop's notifications menu, plus an assisted GUI configuration that generates commands for keyboard shortcuts (xdotool or something), workspace actions (move, add...) and an "Open app" selection dialog. That's gonna take a long while though :(