Lee Kin will be the easiest way. Simply apply for a 6 lesson course, either manual or auto. It will cost you around 3-4k including all fee and they will handle the application for you.
They will call you when the date of written exam is firmed and call you again to arrange lesson before the driving exam date.
The whole process may take around 1 to 2 months as many people are queueing for the exam. The actual lesson only take 3 days as 45mins person lesson and they combine 2 to 1 day.
If you pass, you still need to pay 900 for the HK license.
Hope this help