Short version: You can’t run Wordpress on Netlify. Netlify is meant to host, as you point out, jamstack sites. More info here:
You can use Wordpress as a headless CMS, but it does mean getting familiar with a static site generator. Here’s a pretty elaborate article on how that could work:
An alternative to using Wordpress is Netlify CMS. It’s a git based CMS that integrates with SSG’s quite nicely