i did a study of the girl in the top right. I just cannot replicate the linework that goes effortlessly from thick to thin in an elegant way. Don't think this is just a skill issue. There are some lines I just can't copy. I've played around with brush settings but I just can't get it right. I am using a wacom one so the pen pressure is limited. I really don't know what i'm missing. using ps (edited)