The Epic Quest Line is a single story that runs through the game. It is arranged into Volumes & Books. Regardless of what you've purchased, All Epic Quests up through Vol III, Book 9 or 10 (Wildermors in Eastern Rohan) have been available for everyone.
All other Quests, plus Regional Deeds (Virtues Mostly) are available for purchase ala-carte and/or are part of the rewards for the VIP subscription.
As Questing & Skirmishing are the two best ways to get experience, you'll probably want to arrange to get some of that content one way or the other.
Congratulations on that Deed! You found a Nickel! Wanna go to the store & spend it now?