If you cannot write about what you know, write from your heart.
Research is a necessary evil, for all writers but remember it is for your benefit-not the readers.
Make a plan/format for your article/story but make it fluid;for changes to the story.
Make friends with your hero but give him/her flaws. Finally:Keep learning-no one knows everything!
Your 'story' is unique to you-if you use your own 'voice'. Do not ask relatives and friends to read your draft but use professional Editors. You need to think -long and hard about advice from your professional editor. Believe me- it can be painful sometimes but you know they are experts in their field. Do not be argumentative- learn from your mistakes.