Well, if you genuinly want to imporve your spoken english, you need to speak it on a regualr basis not with people of the same ability but someone who is a native english speaker or as close to one as possible
Watch movies, sitcoms, dramas or what not to help improve your accent and pronounciation. Remeber though, there are many different accents within the english language but the 2 most common spoken around the world are "The Queens" english and American english.