Once registered and in Reattendance, to view your subscriptions you will need to hover over the multi-coloured icons on the left hand side of your screen and click on 'My Billing' at the very top - here you can see your Subscriptions.
If you haven't yet subscribed, you'll see a blue bar labelled 'See Pricing info & Subscribe', clicking on this will take you to the full pricing list for you to choose a Subscription that suits you.