If you are looking to change your presence on the battlefield, then a new outfit for your character could be the perfect option. The character skins are only cosmetic and don’t have any impact on gameplay but they are great designs and can show your opponents that you mean business. Fortnite’s growing catalogue of outfit choices means that players now have a big variety of characters to choose from.
Read full article : Fortnite: How to Change Your Gender and Character - Reapinfo
Currently, if you haven’t unlocked or bought a character outfit then you will not be able to change who your character is. In the latest update Epic Games has also changed it so that players who do not have an outfit equipped will now have the same outfit both in-game and the lobby.