Can a doctoral student who graduated from an American university at the age of 40 successfully apply for a teacher in an American university and become a tenured professor? I'm worried. I'm in my early thirties. Age is not the key. Many people go to study for doctors when they are old. The key is whether you have any goods in your stomach.

Find a good school, find a good teacher to study for a doctorate, graduate smoothly in 4-5 years, find a good school to work for at least two or three years, and then find a school to accept you as an assistant professor and be promoted to an associate professor for five years or more before you can relax a little.

Such a long road, every step is a hurdle, not ordinary people can get by. . . Be mentally prepared.