NEW TO THE U.K WUT TO DO?

HEY! I'M FROM FLORIDA AND I WILL BE VISITING (IM ON THE PLANE NOW!) TO ENGLAND! YAHHHH! I HAVE ALWAYS WANTED TO GO, BUT ANYWAY MY QUESTION IS WHAT CAN I DO? LIKE WHAT IS THERE TO SEE? WHATS THE LINGO?FOOD?WERE SHOULD I GO?HOW ARE AMERCIANS PERCIEVED MY FRIEND TOLD ME THAT BRITS THINK THAT WERE ALL "COWBOYS" THANK YOU IN ADVANCE!