In this tutorial, I go through how you can create users as instructors on your LifterLMS website.

If you’re working with a paid version of a forms tool such as WP Forms or Gravity Forms and you have the user registration feature with that, you can add users who sign up as instructors directly with that role and they can automatically start creating courses.

Or in this video, I show a free alternative that is a simple contact form, but you can use that data to create sign-ups as instructors and it gets you 90% of that flow, the only setback being the delay and manually adding them to your website.