Rookie but One-in-a-Million Actor is a Manga/Manhwa/Manhua in english language, Drama 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

Mooyoung spent his childhood under his stepfather's oppressive rule, a life that felt like living in hell. A mysterious voice in the living hell showed him the way to survive. "Live someone else's life instead of yours." That's how his acting journey began... Was it a survival instinct? Even when he did well, he excelled too much. Through acting, Mooyoung gained a new life. This is the story of Mooyoung, the overwhelming acting genius, embarking on a challenge in the entertainment industry!