Assuming you have already submitted your PR application. Now its time to start preparing step by step. Getting your driving license from home country is one them, Canada Driver License Documents will help you a lot after you land in Canada.
You would require driving license badly if you start to live in remote place or your Job require you to drive. Getting driving license in bigger cities requires you to wait 8-10 months which is too much when you in need.
If you have back home Driver License of 2-3 years old, your driving experience will be counted in Canada and you will be allowed to avoid 8-10 months waiting period. Hence when you waiting for your PR its better to gather Driving License well in advanced to enjoy this advantage.
Learn more about Driving License in Canada.