There are too many accidents in paragliding. I have a strong opinion on these types of accidents, which incidentally worldwide are the most common causes of incidents turning into accidents. I think active flying can only come after flying for some time, and one learns it quicker by first doing proactive flying.
Pendulums can start through a bit of turbulence and can then be amplified by the pilot's reactions.
If the reactions are late, the movement gets worse because the pilot thinks he is trying to stop the swinging, but in fact he is aggravating it. He often attributes the increased swinging to more turbulence, which is mostly not the case. Active flying is feeling and anticipating what is going to happen, and acting without over-controlling before the glider has a chance to initiate a problem or proceed too far. The difficulty is learning to feel the glider, knowing what is enough input and judging when and how to apply it. I teach my students proactive flying.