I will make no judgment on the way you like to play your game. Cheating in video games is a reasonable thing to do and people do it once in a while to make their games easy because doing essentially anything in videogames is an absolutely reasonable thing to do. It’s your game, after all, and you should do what you want with it and as you please. Animal Crossing: New Horizons is a game that exists and dies by the real-world calendar: the sun grows in the morning and goes down in the evening just like in real life. When it’s springtime outside, it’s springtime in the game. If you are waiting for the bugs of summer, you’ve just to wait for summer in the real world. that is unless you cheat and modify the game.
If you bought Animal Crossing: New Horizons at release, you’re now a few days into the game. If you’ve worked a good amount, you’ve likely accumulated a decent collection of bugs and fish in the museum, maybe exhausting those readily available here in March. You might be motivated to skip around and get some more, so: here’s how you do it.
1) Go to the menu, select Animal Crossing: New Horizons, and close it
2) Go to your system settings, select “Date and time” and turn off “synchronize clock via the internet”.
3) Set your date and time to whatever you please to do.
4) Head back on in.
Know that there are some reactions to your actions. If you skip time the game will act as if all that time really passed without you doing anything, and so your island might get crowded with weeds or your colleagues might skip town. It can be a bit sad, but this is the price that you pay for changing the fabric of time itself. You can always get new friends!
The advantages to this are clear: you can search the island at a different time of year to get various other fish and bugs. You can also garner huge amounts of bells from the interest on anything you have in your bank account—not your pockets.
The most important downside of this, aside from the more normal ones, is that you break the fiction of the game. If the joy that you get from this game is the clear information that you have another home out on an unspoiled island, maybe don’t cheat at all. But that’s your won decision, so do what you can with it.