>>96069098 (OP)Not as long as you enjoy what you're doing and your notes don't get in the way of the game.
That said you can get away with way less prep than most people assume. Just don't fall into the "no prep" trap. If you're not a seasoned GM, your games will be shit and even if you are, they'll be mid at best.
If you know how to properly prep, there's very little you need to actually do, but the more ressources you put into it the better your game is going to be.