From what i know you also need to take examinations (written and Clinical) and here's the link below: Nanyang Polytechnic - SHS - Qualifying Exams

First and foremost, you need to have an employer who's willing to sponsor you and once they are interested in you then that's the only time what you can proceed with the examinations. Goodluck and God Bless!! CHEERS!! =))

Charlize29