If you see a Story you really like, press and hold on it and tap 'Subscribe'.
You'll see the Story in the Subscriptions section, and you might even see more Stories like it!
To unsubscribe, press and hold on a Story, then tap “Unsubscribe”.
You can manage your subscriptions and notifications, too, so you never miss a Story!
Tap at the top of Stories and tap 'Manage subscriptions and notifications'.