Circular cleans are a great exercise to improve your core stiffness and full body tension. However, it is certainly an advanced drill. The idea behind the movement is to force the kettlebell outward away from the body along the frontal plane, and then cleanly redirect the bell back toward your rack position in a downward arcing motion. The difficulty will be in staying tight through your abdominal brace and staying grounded with your feet. Even a modest size bell will pull your center of gravity away from you, and fighting to stay still, tight, and fluid is where the major benefit comes from.