Can apply right away, check the respective provincial site for ID and other requirement... if you hold a license from another country it may be exchangeable, or your driving experience may carry over... Be warned some proviences have a graduated system, meaning it can take over 2 years to get a full license... If you can't directly exchange your license and have plenty of driving experience, get a drivers abstract from your country's transportation commission to prove experience, you can have the license after you complete written and driving test (at least that's the way it worked for my husband in ontario)