There are a number of options to start diving.
The PADI Discover Scuba Diving course allows to you get a taste of diving before signing up for the full scuba certification course to become a PADI Open Water Diver.
You can enroll for these courses from the age of 10 years old. If you are between 10 and 15 years old you will earn the Junior Scuba Diver or Junior Open Water Diver certification. You will learn the same theory and skills as adult students, but for safety you will stay at shallower depths.