Here is what I learned and it is very relaxing doing it. It looks like a lot but the instructor Cindy Bishop walks you through every stroke so it is quite easy.
Here is the information about the class from the online site at HVCC.
Zentangle® 101: The Basics
The Zentangle ® method is a fun and relaxing way of creating beautiful images from repetitive patterns. Created by Rick Roberts and Maria Thomas, Zentangle was designed with the non-artist in mind. Zentangle has been shown to relieve stress and anxiety by boosting focus and creativity. It provides artistic satisfaction and an overall sense of personal well-being. Each participant will learn approximately 3 - 4 'tangles' per session. The Zentangle method is enjoyed the world over, across a wide range of skills, interests and ages. "Anything is possible, one stroke at a time." This course is taught by Cindy Bishop, Certified Zentangle Teacher (CZT). For more information, please visit: www.zentangle.com.
Here is my work and I got creative on both sides of the square cards. It looks quite overwhelming to someone who is new but if you go to google.com and type in steps to zentangle you see every stoke/step broken down for you.