You can try a Paper Website for 7 days for $1 here: https://paperwebsite.com/signup
Resources for OCR and hosting could be provided by the users themselves. You doing it for them could be the expensive option that justifies getting the credit card out :)
Apple Notes of your note book, then Markdown “Exporter” app* into a static blog generator of choice does require that last thing, a statis blog generator, which may(?) be worth the $8/month of hassle alone.
* Exporter: https://apps.apple.com/us/app/exporter/id1099120373?mt=12
Lovely little app, lets Apple Notes be your blogging editor — support the dev!