American film career?

Hi! I am 14 years old, I'm Portuguese and my passion is cinema. I always had the dream of entering the American Cinema and to get a great career as an actor, but lately this dream ever more towers, especially since I saw the Black Swan, because I loved the movie and is the kind of feature film (Psychological Thriller) in I want to work. If I were living in the USA would be easier, because I want to begin a career as soon as possible and I know I have the support of my parents could go to castings and so, but I'm in Portugal, the country has no great projection abroad. What advise me to do? Thanks