Structure Analysis

Wheeler-Nicholson's first two titles were the landmark New Fun: The Big Comic Magazine #1 (cover dated February 1935), colloquially called New Fun Comics #1 and the first such early comic book to contain all-original content, rather than a mix of newspaper comic strips and comic-strip-style new material. His second effort, New Comics #1, would be retitled twice to become Adventure Comics, another seminal series that ran for decades until issue #503 in 1983, and was later revived in 2009.

I'd like to know whether or not it is right that "the first such early comic book" modifies "the landmark New Fun: The Big Comic Magazine #1."
And I'd like to know whether "the first such early" modifies "comic book."

Thank you in advance for your answer.