My dear friend, it is simple. Just go to Madina Khalifa police station, where issuing new and exchange, temporary licence for expat. Hope you can get your Qatar DL if your country DL valid or otherwise you can get 3 months temporary QDL. Just go to that place and check with local staffs who open shops near the station like typing and translating shops with sudan nationalities. I am sure they will guide you to get your DL soon. GOOD LUCK.