how to get an art style
You draw a lot. One day, you draw a bit that is sort of different from how you were drawing it before, almost by accident. You look at it and think “oh, I like how that looks.” Then the next time you draw something you try to do that again, only more so. Then again and again until you are doing it all the time, because you like it that way. Sometimes this happens without you really even noticing.