If you are over the age of 14 and do not have any health problems, you can start diving with the beginner levels of all diving systems.
Breathing underwater is discovering a magical world with all its beauties. It is a freedom like flying. Li Mu Jeng's expression regarding underwater explained this experience beautifully;
"Diving is not only getting wet, it a freedom taking you to the deep blue waters; It is a big world isolated from noise and evil, it is a magical journal accompanied by your own breath."