Bring Some Tech to Diablo

Does Amazon use sniper rifles? Barbarians use Gatling? What kind of different experience will the male protagonist Lei Ze bring to the people of the Diablo world with his modern technological skills? This is my first time writing a novel, so I am a little unskilled. I will learn more and welcome everyone's advice. Some of the knowledge about job transfer in the novel was learned from the Internet or books. If there are some mistakes in it, I hope you will tell me and I will correct them as soon as possible!