For any websites hosted here, you need arrange alternative hosting for your website before your subscription ceases as you would be locked out the platform, site support back ups are only available for 60 days.

You can never revert back to being a starter.

I also suggest you backup your sites, you can use the AIO WP Migration or Updraft plugins. UpdraftPlus is a premium and highly recommended
.
Also domain names must have passed the grace period of 60 days.

I never did actually get up and running. I was hoping to find an unsubscribe button!
Is there an unsubscribe button?

You can go here

https://my.wealthyaffiliate.com/account/subscription

And cancel billing.

I would follow procedure to cancel billing | unsubscribe.