A lot of people worldbuild when they daydream and have the bones of a story kicking around in their brain, but have to pay the bills and raise the kids etc so they never flesh it out and write it down. What’s your story’s premise? Fantasy, sci-fi, alternate history, mystery, western, whatever genre.
I couldn’t really think of anything other than an autobiography, or ANOTHER science fiction story set in space (with fish and Toki Pona this time around, and four girls as the protagonists). Actually, I prefer that last thing to be an animated cartoon than a novel.