Everybody will say. The key to being a writer is … write.
Don’t talk about it at parties, or on social media. Just write. At first possibly we all want to write the bestseller. One book that means we never have to work again. It didn’t happen for me, and I suspect it won’t happen for you.
Writing is a craft and we have to learn as we go. My suggestion is try a few short stories. You could do worse than look at the nudge page and see if you can get a short story, say a thousand words based on a choice.
By taking a set of prompts, I often find I can pull something together.
Remember, the first ingredient is conflict. As is the second and third. It is conflict that keeps a reader reading. How do we do that?