you don't really look behind when you are changing lanes. you only look to the side where it is called the blind spot. this is a blind spot because you cannot see a car right beside you because it is tooo close to be in your side mirrors.

don't worry, i almost crashed a curb when i was driving. it is only easier to drive in america because this is where you learnt to drive. no big deal. your just not used to driving in a diff place. keke^^ don't wollie. everything'll be just fine. plus....good driving takes years and years of practicing.