You will have to visit Driving Licence office with your CNIC. They will do your medical/physical examination, snap pictures, fill the form, pay the fees, take a small test, and you are all set to have hands on your learner's driving licence in a few days, it will be valid all over Pakistan. You won't be allowed to drive on Motorway/Highway and you will have to put a big 'L' sign on rear of your car. After two months you will be eligible for a permanent licence.