Given the standard of your English, I'd recommend reading some of the great stylists of English, where you will see how they achieve their effects. Among the writers I think use English very well are PG Wodehouse (comic writer, but one whose prose bubbles with creation and imagination), EF Benson (a writer who uses a light prose to devasting effect when being bitchy about people), George Orwell ( a true master of the language). AJP Taylor was a controversial historian, but his books are fascinating and beautifuuly written. Keith Waterhouse is a British Journalist with a lot to say about the language and how to use it. Any help?
(These are all personal favourites and British English, btw)