In a World of Swords and Sorcery, Be an Occult Scholar?

Hey, hey, why do other people who travel into those weird and cool fantasy worlds either have systems or cheats, but I don't have anything? Full of complaints could not change the real predicament, and Mandela had to accept the fact that he had no magic talent and was extremely weak. But even in a different world, he still had to eat. Only then did Mandela realize that the occult science he studied in his previous life seemed to be his specialty in this world! Divination, witchcraft, and various branches of occult science are used to try to survive in this world. Mandela's ultimate goal is to explore the nature of the world and find a way home.