First, welcome. Second, what a pretty name. Third, to answer your question:
Near the bottom of the page of the topic you have chosen it says:
Subscribe Topic
Select it.
Then near the top of the page it says:
User Control Panel
Select it. Next, choose the tab:
Manage Subscriptions
Then you should see the topic you have selected appearing there.
If you need any further help please ask.
Best,
Dirk
