Duke William of Normandy won the battle because was well prepared and had a good army. They prepared carefully for the battle. The Normans had knights on horseback who were skilful fighters.
A utility knife, metal ruler, and a hammer can be faster than trying to carefully saw an opening. Score the drywall a couple times till you are most of the way through, then just knock a hole with the hammer and break the drywall back at the score lines.
Make sure the breaker is turned off. 8. Run the supply wires behind the wall to the outlet location. You will have to cut holes in the drywall, chisel space for the wires in the wall studs and use a fish tape to pull the wire along. You should have already measured and cut the hole in the drywall for the outlet.