I remember when I was half-way–or nearly halfway–through writing the Russian American School fo Tomorrow.
I quite my job, in part because the hours were so long they didn’t let me work on the book. I figured I would quit, live off savings and unemployment for a while, finish the book in 3 months or so, and be done.
10 years later I still wasn’t done.
Things don’t happen on schedule like that.
Creative outlets gestate on their own time.