To change your skins please head to the locker room area in any Hub map. You will automatically connect to this area whenever you start up the game. You can use the pointer to select your avatar, gloves or any of your weapons in your locker. Once selected you can scroll through any of your skins you have unlocked from the Battle Pass or purchased from the Item Shop. Once the skin has been selected you will see a message stating the skin has been 'equipped'.