There is a continuum between drawing and sketching. Drawing has to do more with the literal interpretation of what is seen, while sketching has to do more with indicating just enough from your mind’s eye that you can have a conversation. A drawing is a one way communication, while a sketch is a two way communication. A sketch can be interpreted, debated, discussed, built apron. Focus on the ideal manifestation of the idea, not the literal translation of it… that and originate your lines from the arm not the wrist 