Even the basic course just guides you as to what you should aiming for. To become a good permanent makeup artist you should draw thousands of eyebrows, learn color theory, different shapes, try to work on different skins, practice on fake skin (workshop, master classes, makeup trainings).
Not everyone can become a good artist, you should have a good aesthetic vision at first. You should pay attention to personality of each individual client and not working with a stencils.
All faces different and you have to emphasize their beauty by doing natural permanent makeup!