But don't worry - we're here to help make sure you get the most foxy-looking Ryder possible. Your only option is to restart the game from scratch and try to do better the next time around.
There's no way to change their appearances once you've started a game. Not happy with the way your Scott or Sara Ryder turned out once you started playing Mass Effect: Andromeda? We've got bad news. To do so, use the facial reconstruction station on board the Tempest in the med bay. Update: Mass Effect: Andromeda patch 1.08 now allows you to modify Ryder's appearance mid-game.