Congratulations on the book deal! I have similar feelings about writing since the advent of AI. I feel like social media had already shortened peoples' attention spans and this, in turn, decreased the amount of readers interested in longer-form content. Now we also have to compete with AI-created content for that same small group of readers. My gut tells me after AI is fully integrated into society, and the dust settles, 100% human-created content will become a niche market that will command a premium. Every new generation begins to feel nostalgic about the way things were and I'm really hoping that happens in this case. For now I write, mainly, for myself—book sales have become few and far between. I'm thankful I had a decent decade in the indie author realm though and I'm sure there are still many opportunities for others.
RE: Overwhelmed by the Amount of Words ...