You can use a mirror furniture item to change your appearance, including your style, skin tone, facial features, and more.
Getting a Mirror
To change your appearance, you need a mirror. There are recipes for mirror furniture items, so talk to residents, check the beaches for messages in bottles, and so on, to try to get a mirror recipe.
Put the Mirror in your Home
Mirrors are furniture items, so when you have one, place it somewhere so you can use it. Using it will take you to the appearance interface, similar to when you first designed your character.
Unlocking New Looks
With the Nook Stop terminal in the Resident Services Tent, you can redeem miles to unlock more hairstyles and hair colors.