Write what you want to write about. Write about what inspires you. Write about what you think about when you’re walking under the stars or in the rain. Write the story that you have always wanted to tell. Write about the characters that won’t leave your mind.
Then, have the courage to write what you love. Then, re-write it until it works.
Do not worry about its marketability or who will like it. If you like your own work, it’s all that matters. Someone else will treasure it if you treasure it first.
Don’t just write about what you know, write what you love.