The beautiful thing about a line is that it can evoke so much emotion in the way you draw it through the movement of your hand and body. Think of a music conductor with a baton or different types of dancers. How they move is their way of conveying to the world how they feel.
I get a lot of questions from people on how they can learn to draw in one line. First off, I'm no expert. I believe this style of drawing or painting has a lot more to do with feeling – as mentioned in my earlier statement about a conductor or dancer.
I plan on creating an in-depth tutorial video for those who are interested, but for now, I'm happy to offer a few tips that can get you started.
Try holding your pencil, brush, or marker with a loose grip, turn on some calming music and allow your body, arm and wrist to fluidly move around the paper. The results may look very messy or abstract on paper, which is not a bad thing. But overtime, you’ll develop muscle memory and confidence where every line you draw will feel intentional.