Hi @mwum and @Surgtech808,
The Free-for-teacher interface does not have Admin access available. For that, you'd need to either pay for an Instructure-hosted Canvas instance, or perhaps try to run your own open-source Canvas instance.
For enrolling users in free-for-teacher, I believe you can just add people to your course using their email, and it will send them instructions to create an account and enroll in the site.
For adding scripts that need admin access, I'm afraid you'd be completely out of luck on the free-for-teacher version of Canvas.
Hope this info helps, even if it's not the news you were hoping to receive.
-Chris