https://www.gamespot.com/articles/fortnite-challenges-season-6-week-1-dance-in-stree/1100-6462106/

The first week of Fortnite Season 6 is here, so you have a whole new set of challenges to complete. The first three are free, with the remaining four locked behind the game's Battle Pass.

Despite it being a new season with several major changes, there isn't anything drastically new with what you'll have to do to complete all seven challenges. If you've been keeping up with Fortnite these past few months, then this week's challenges should all be fairly familiar. The first three free challenges will net you a total of 13 Battle Stars, and completing the four Battle Pass challenges rewards you with another 16.