Writing is hard.
I don't necessarily mean the actual writing part. That usually comes pretty easily to me. I just switch on the movie in my head and start writing what I see. The characters and the scenes unfold, along with the blocking, pacing of the scene, and the dialog.
What's hard is being the writer behind everything else. When you publish independently it's not an "if you build it, they will come" situation. You have to market the book with dozens of posts, schedule and pay for ad...