Find a good country to learn to fly in (Aust, Canada, USA, NZ), then:
1. Do the medical (can do this in HKG),
2. Study for the exams (books, notes and sample exams are available for most places)
3. Travel to the training country and sit the exams on the first day
4. Fly for 3 weeks and have a PPL (choose a time of year when the wx will be good)