No special preparation required! All you need is to listen to the safety briefing and complete a short training course.
At first it might seem a little tricky, but don't worry, practice makes perfect. Soon, your body will get used to the new movements and you'll realize how to move about in the air flow. After a few minutes of floating in the air, you can understand how your movements affect flight, learn to properly turn, move up and down, and even experience the feeling of a free fall.