This feels like a home run, talk to some publishers about allowing their books on their for a fee and charge a subscription to type those books and maybe you've got a viable product.
Think about how masterclass does it, then niche down into startups and follow the playbook.
Feel free to ping me (email in profile) if you end up going down this path and need suggestions for initial folks to reach out to.
Oh actually, while you’re on the front page of HN, drop a contact form on the page with something like “interested in having your book hosted?”
Might “fill the funnel” with even less work. Good luck!