As a writer I can tell you some things to help out.
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1) The first sentence of your story is the hardest part to write. After that, many, if not most, stories flow organically and tend to write themselves.
2) Don't force it. You have to have that itch to start writing. And when you're writing if that itch goes away, don't force yourself to continue. Finish the sentence you're on, save it, and stop writing for that time until the itch comes back. Forcing it will make your writing pure shit.
3) Think about what you're wanting to write before you start. How you want it to start. What you want to happen in the middle. What you want the ending to be. What kind of conflicts you want the characters to face in order to keep the reader reading.
4) What kind of story you want to write. Fantasy, thriller, drama, sci-fi, horror, comedy, etc. Think about what kind of characters you need for your story.
5) Decide if you are the one telling the story or if a character is telling the story.
6) And most importantly is it fiction or nonfiction.
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These are just a few things. There's a lot more, but this should help you get started in the craft of the written word.