How to diagram power-side and ground-side switches?
Not sure if I got your question, but as another self-taught hobbyist, this is how I would do it (dotted square optional naming):







simulate this circuit &ndash; Schematic created using CircuitLab

On many schematics, there is actually more one "GND". Say AGND, DGND, EXT_GND (analog, digital, external gnd for galvanically isolated parts, etc).

So its not uncommon to just differentiate them by name. Then you can just draw the switch wherever it is, and you can optionally name that node if you wish. Same with Vin, V+, etc.

Or:







simulate this circuit