Thought to write a book!!

Its 2:15 am of night and many thoughts are placing in my mind ,Many things which are undone many words which are unsaid ,many more work to be done ...So need motivation from my own life need to do something good and show the entire world who i am and why i am born in this world ....I know you all must be thinking i am saying too much yehh its too much but i need do so, I am left with no moral in my life ,i see deep dark ocean and myself standing alone ,So i need to write a book ...i have a lot of stories ,thoughts, and happenings with me today i am thinking to write a book ,My roommate has told me that please don't share your incidents with anyone because people don't believe you so its better to write a book,

I don't know from where to initiate and how long this book will go....

But Today i have decided one thing words are the only things which matter in life and which may remain always in this aura .So readers,please give me some sort of support so that i can startup with my fiction.And tell me some needfull things which a book should have ......