Digital drawing tip on getting smoother looking lines: 1. Make fast confident strokes. The longer you take to make a line, the harder it will be to keep your hand steady. Don't worry about making mistakes. The undo button is there for a reason. It may take a while at first, but soon you'll not only be able to draw more smoothly, but you'll draw more quickly too. 2. There is a stabilizer in most digital art programs. I keep mine on a level 10. Trust me, it can make a difference. 3. Keep practicing. You WILL improve.