"I wrote two plotted books, got some of the fundamentals of storytelling down, then... it's sort of like taking the training wheels off, trying to write a book that's fun in the same way without relying on quite such mechanical or external beats"

In this quote, Jonathan Franzen offers a peek into his evolution as an author and his relationship with the craft of storytelling. He begins by acknowledging his early efforts in composing plotted books, recommending that these initial jobs worked as exercises in understanding and mastering the mechanics of storytelling. This phase of his profession belonged to discovering the basics-- plot structure, character development, pacing, and the other technical components that form the backbone of a book.

Franzen's usage of the metaphor "taking the training wheels off" implies a shift from relying heavily on structured, possibly formulaic storytelling methods to embracing a more organic and intuitive narrative design. Training wheels, typically used by kids learning to ride a bike, represent a stage of advancement where support and assistance are essential. Removing them symbolizes readiness to balance and propel oneself separately. In the context of writing, this suggests Franzen's desire to move beyond the basic, mechanical method to narrative building.

By aspiring to write a book that's "enjoyable in the same method", Franzen looks for to preserve the enjoyment and engagement derived from plotted stories while striving for a natural flow that doesn't depend on foreseeable or external beats. "Mechanical or external beats" describe the conventional plot points or tropes that can in some cases determine the instructions of a story. These components, while helpful, can become crutches that prevent deeper expedition of styles and character. Franzen's aim is to craft stories that mesmerize through their authenticity and depth, rather than through expected plot gadgets.

Ultimately, the quote reflects Franzen's journey towards a matured authorial voice-- one that is confident in its capability to weave appealing stories not entirely depending on standard structures. It talks to the bigger artistic pursuit of striking a balance between technical proficiency and innovative liberation, permitting an author's unique perspective to shine through.