There is not any posts under my list subscribed folder under my user cp, i know i'm new here. Is it because i only have 8 post.

You have to turn that function on....

Anybody can have subscribed threads, doesn't matter if you haven't posted before.

Here's how to subscribe to a thread (it's optional):

On the top right corner (of any thread), you will see Thread Tools. Click on that and choose Subscribe to this Thread. Then select your notification type. After you're done, you can view the thread in your User CP. Just go to View all Subscribed threads in your User CP.

Hope that helped.