How do I register Red Hat 8.9?

I successfully installed RH8.9 on my workstation for testing. I am trying to get the OS registered so I can move ahead with installing the extra libraries and such before testing some software to see how well it works. The software only works with up to RHEL 8 series.

I'm still stuck on the organization ID on the 'registration' dialogue. I can't find any real instructions, but I'm assuming I enter my login ID and password which is the same as I use for this site.

I've entered the organization ID number that was provided to me, but the screen greys out and does nothing. The internet is on since I can use Firefox to browse sites.

I also have a subscription number. I've tried a couple of things like Org ID, account ID, and subscription number.

What am I missing here?