I�m from venezuela I�m studying English but I can�t understand when I see a movie help me please?

i can a understand some words but only some, is too hard when the people say contractions for example you�ll I�d and the people speak very quickly please give me advices what should I do? if you are American is better thanks you please if you can give me you messenger I�d like to meet an american people thanks you 10 points.