Deadlines work wonders
I’ll second this.
For a long time, I knew I wanted to be a writer, but I would sit in front of a blank screen and nothing would come out. Sometimes I would write a sentence. If I was lucky, I’d get a paragraph.
That went on for years. Paralyzed by self-doubt.
What finally broke the trance? Signing up for a creative writing class. Suddenly I had a deadline and I had to produce a story.
Took me two months to write that first 15-page story. But I did it.
And now I can write 15 pages in 2 days. A single day, if I really push myself.