I've searched around SE and see a lot of similar questions but not this exact question:
Basically, looking for a way to swap cmd+W and cmd+H either in the OS/System Preferences or with an app. I use both all the time but find it's just easier to hide rather than close apps so as to not have to (re)maximize closed apps.
I'm aware of the differences between the two and prefer to use a single left hand key combo (cmd+w) to hide rather than having to move my right hand (cmd+h)to hide.