" Whether you’re publishing your island from Fortnite Creative or your project from Unreal Editor for Fortnite (UEFN), the Creative Portal is where you go to publish all your islands. The portal provides everything you’ll need to prepare and submit your island."
When I tried signing up yesterday it was saying I needed the 1k followers.
At this point, you should have built at least one island experience and signed up for the Island Creator Program. The next step in giving your island visibility is to submit the island to Fortnite for publishing."