You can't simply go to the My Nintendo Store and buy the Switch 2. To order the Switch 2, you need to log in with an active, paid Nintendo Switch Online account. Once you do that, you can choose either a Switch 2 standalone console or the Mario Kart World bundle and then hit the confirm button to "register your interest" in ordering a Switch 2.

Tonight is the official launch of the Nintendo Switch 2, a console people have been waiting for years to arrive. Some publications and influencers received theirs one day early, but for the rest of the world, tonight is the first opportunity to play it. And for a lot of the people in this line, that means they’re willing to wait a little longer.