Start small: try some fan fiction
If you’re new to writing fiction, you don’t need to start your fiction career by writing a novel. You can write short stories.
Vital: have FUN with it. Try writing fan fiction; this may give you the boost you need.
Many authors, including E.L. James of Fifty Shades fame, got their start writing fan fiction. In the Jane Austen fan world, writing and selling Jane Austen fan fiction is now a thing. It’s developing into a genre of its own.