Have your exit strategy in place before going in.
And I 2nd the advice to doodle/draw your shapes and patterns a lot. Be obsessive about it. Any time you're just sitting there, doodle and put your focus on being smooth and keeping the spacing fairly consistent.
Then just do a whole quilt of spirals. Don't stop and rip out if you make a mistake. Keep going and keep making each one better than the last.