Having lived in North Dakota, I can tell you that the entire state drops way below zero in the winter and stays there for long stretches.
Regarding your preparation for winter, you definitely want either a block heater or a lower radiator hose heater (I preferred the hose heater). Either will warm the water jacket and the coolant will circulate via convection. Oil pan heaters do not work well, because the heat doesn’t circulate through the engine. Nobody who lived there used oil heaters.
And even though it’s a new car, I strongly urge you to get a heater installed. Talk to anyone who’s lived there and they’ll wonder why you’re even asking… the need for a plug in engine heater is a “given” in North Dakota. If you’re renting an apartment, you’ll even have a 115VAC socket on a post in your assigned parking spot with a switch in the apartment to turn it on and off. NoDaks don’t consider this unusual. They consider it perfectly normal, a perfectly reasonable expectation for a renter.
You’ll also want to read the back of your antifreeze bottle and put a fresh mix in of the lowest temperature ration indicated on the bottle. It’ll probably be 50/50, but don’t guess. And I’d suggest that you spend the extra bucks to get the correct coolant directly from the dealer. North Dakota is very intolerant of incorrect fluids.
Be sure you drain your washer fluid system and put “winter mix” in there as well. The “summer mix” you probably have in it will freeze faster than you can say “oh sh&%” in -40F.
And make sure you have good winter tires on all four. You’ll often be driving on packed ice up there.
One more suggestion: watch the movie “Fargo” if you can find it. It’s well, well worth it. It’ll give you a real good idea what you’re in for. You’ll enjoy the movie… if it doesn’t scare the bejesus out of you.