Hi, Chandrashekhar! How you begin a story is entirely up to you, and it really depends on what the story is about. There is no exact way to start any story. The link that Colin provided offers some very helpful tips; ultimately though, the decision is yours. I hope this helps =)

Take a look at this site: https://www.nownovel.com/blog/ways-to-start-story-examples/ It suggests 5 interesting ways and uses examples from real books to illustrate the point.