The driving instructors themselves dont know much... about the traffic rules and driving...

People usually are afraid that the instructors will fail them so they pay the bribe. There is no relation between the instructors and the driving test officers. The instructors are not even allowed to come near the test arena.

Another easy way is to enroll for automatic car driving instead of manual Car. Learning an Automatic Car is 4 times easier than a manual one. It is also much safer for a beginner. Then the driver only has to concentrate on the steering wheel and the traffic.

I think its possible to learn to drive an automatic car reasonably well within 4 to 8 hrs (driving time) for a newbie.