The Top Ranker's Aspiring Writer Life Manual is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

A legendary hunter gives up his title to become a web novelist, only to realize his stories lack realism. To fix this, he disguises himself as a weak F-rank hunter and joins a struggling guild for research. What starts as simple observation turns into genuine admiration, pushing him to grow both as a person and a writer. Can a former god-like warrior succeed as an ordinary novelist?