Zoom Webinar

Hi, 

I have A Zoom webinar that will be for up to 500 hundred users. I need when starting the webinar that only those people who have paid the subscription to the course be able to join the webinar. So, I need to know first:

- Which license should I buy? 

- I need to double-check with something that is: to allow only users who paid to get into the system,

- I first have to enable registration, and then enable authentication and disable automatic approval, and then from my account as a " owner role" allow people who have registered to log into this webinar. Are these steps correct?