That's actually the easiest way to get to the Mun in my opinion. No need to plan anything anything just shoot straight up. If you don't get an orbital encounter initially just keep shooting up until you do, it'll happen many times before you reach Kerbin Escape velocity. No need to time anything or plan certain maneuvers.

Basically shoot upwards until you get an encounter, speed up until it auto slows you down near the Mun, then kill velocity to fall in and land.

Grossly and hilariously inefficient but actually easier to perform than the "correct" way (and typically faster in player-time).