Frodo Baggins' journey in The Lord of the Rings is undoubtedly heroic. Taking up the mantle to carry the One Ring, the very weapon that could change the tide of war, and ensure its destruction is no small task. However, according to Joseph Cambell, the author who coined the story structure of a hero's journey, it's Frodo's own heroic quest that prevents him from having a typical hero's journey. The hero's journey is typically made up of twelve steps broken into three acts. The call to adventure, crossing the threshold and the ordeal are a few steps in a standard hero's journey. However, the One Ring uproots Frodo's journey with its very existence.
Source:https://www.cbr.com/lord-of-the-rings-frodo-heros-journey-failed-ring-power/