so u study reality and u then modify it to make it more appealing... e.g if u think babies look cute, u make the eyes of a face bigger and also forehead bigger with still some characteristics of a adult face and to do that u have to study the features of an adult face and a baby face, the skull structure etc.. u can take inspiration from other artists u like by studying how they modify reality and make it appealing and by doing that u will develop your own tastes.. your tastes will define your art style.