"cinema" and "movies" are interchangable for the place you to go watch a film - I am going to the cinema/movies. film and movie are the thing you watch. We are going to watch a film/movie movies is also the plural of movie

i see you speak portugese, and as don't speak any I can't really compare them but apparently, learning the pronunciation of many english, or american words for that matter, is difficult as letters grouped together can make many different sounds. take "ou" for instance - though - "th-oh" house - "how-se" you - "y-oo" brought - "br-au-wt" soup - "s-oo-p" but once you hav discovered the phtonetics of words like these i suppose it isn't too bad. hope this made it simpler rather than more complicated