Kidnapping an Immortal as a Thug

Eighteen years ago, there was a catastrophe, karma set fire to the prairie fire, and the people were in dire straits; Eighteen years later, a doctor of medicine from the 21st century traveled through time and transformed into a useless disciple... Whoever wants to take the medical field will not be able to reach the pinnacle of life? What should I do if I meet a sinister Immortal? Of course, he turned back and became a thug!