I need help in writing an introduction of a book

I would like to write a book about my life and the experiences, what would be the introduction

I would write the book first, and then see what sort of introduction you need.

One thing I'd suggest. Even though it seems the most logical approach, don't start with your birth and work up. Unless you were a test-tube baby or born in the middle of an earthquake, that is likely to give a boring first section to your book.

Pick a high point in your life, start with that, and go back to your childhood in flashback. That way, you can give the interesting bits and skip all the stuff about how much homework you got in second class.