How to ACTUALLY grow traffic from 0. Does AI written content bring any results?

Hey everyone, need some good advice Basically, I am working on a project that is just getting started, we are working on some content and the off-page SEO. This is the first time I am doing both on and off page SEO for a product and I am a bit hesitant. What actually worked for you and your project? Another thing that bothers me is the founder wants to write all the content with AI, since we don't have a writer and they don't want to write it themselves, I can't do it either seems I am a freelancer and work for 5-7 hours a week on this project so I have other tasks to take care of. Will this work? I am trying very hard to convince him to write some stuff without AI, but so for no luck Thanks!