Pretend to Be a Magician

I was originally a Taoist boy at the Wuming Gym, but I accidentally traveled to a different world. I heard that there is magic and monsters here; I encountered a monster at the beginning. In panic, I accidentally killed the monster. As a result, they all thought I knew magic, but I really didn't! In this world, I want to be obscene and develop, don't be a waste. By the way, does anyone know how to pretend that they can do magic without letting others find out? Looking for strategies, waiting online, urgent! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.