If you think you don’t know how to write, start writing. The best way to learn anything is to just do it. Write as often as possible and as much as possible. I have been writing now for about seven years and for the first two years I just wrote about my life, my experiences, my childhood, my job, etc., things that I knew intimately. If you just write about something you know, the words will flow and you will be gaining valuable writing practice. Get started now if you want to be a writer.