Fantasy: I'm Really Not a Peerless Expert

"Ding, god-level piano skills!" "Ding, god-level chess skills!" "Ding, god-level painting skills!"... "Ding, host, this system has taught you everything it can teach. See you soon." "No, system, you haven't taught me how to practice yet!" Lin Fan traveled to the fantasy world. Not only was he abandoned by the system, he was also a useless body with no talent for cultivation. He had no choice but to become the humblest mortal. But... He painted casually, hiding a small world. The chicken he raised turned out to be a phoenix. The big yellow dog he raised turned out to be the Supreme Demon Emperor. Countless strong men rushed to become his disciples. Lin Fan was confused about this. What's going on? I'm really not an expert.