Apart from the copyright issues involved, the heavy environmental toll of generative AI and how it is more likely to restrict your imagination rather than expand it, generating a novel won't actually give you that satisfaction of writing a novel. It's simply not the same thing at all, and more similar to asking someone to tell you a story with very specific requirements.

The joy of finally completing a novel is all about the process it took to create something that is wholly, uniquely yours, flaws and all, and that you can feel proud of. Don't cheat yourself out of that.

If you find it difficult to get started, figure out what exactly is the obstacle: is it in coming up with plots, or characters, or a matter of your language skills? Read more books and stories in the genre you're interested in. Watch movies, and watch people. Inspiration is everywhere. Then, write as much and as often as you can, and you will naturally get better over time.

All the best, and I hope your dream comes true one day.