Read books written in 'Omniscient' and see how it's done. Then take what works from that lot as you write your new story. Fwiw, the 'omniscient' narrator can be thought of as a 'storyteller' - it is not involved in the story, but conveys the story to the audience(reader).

NB - make sure that the story really is consistently written in this point of view. If you read a 19th century novel, odds are very good it is written this way.