Before you can board the Battle Bus on PC, you'll need to download the Epic Games Launcher and Fortnite. If you haven't already, install the Epic Games Launcher. Once you've installed the Launcher, follow these steps to download Fortnite and start playing.

With your Epic Games account set up and connected to your Nintendo account, you can now open Fortnite on your Nintendo Switch. Tap the Fortnite icon on your Nintendo Switch Home screen to open the game. The game loads after a minute or two, and eventually you're shown a welcome screen.