If you are talking about changing farm maps, it is possible... but not on Switch. Even when it is possible, it can glitch your save pretty easily, from what I've seen.
You'll have to start a new save if you want to play on a new/different map... but don't despair! See, sure, you've put 60 hours into this save, but that was 60 hours of learning. Now you can start a new map and apply what you've learned, you know?