The SSI System of diver education allows anyone from the age of 8 to experience the thrills of the underwater world.
Diving allows you a degree of freedom and weightlessness that is normally only experienced by astronauts.
Most people begin their Diving Education with the SSI system, the SSI Open Water Course. This takes three to four days depending on where you learn and qualifies you to dive 18m with any other similarly qualified diver.
You can start Scuba Diving course from internet.