When parents urge marriage, you should understand them and tell them the real reason why you don't want to get married. After marriage, it means that the burden on your shoulders is heavier. You must have enough economic foundation to support your family. If you get married too early, your life will be very difficult. If you say so, your parents will understand.
The reason why your parents want to force you to get married is because you want to have grandchildren, and old age is boring. They want to look after your children and add fun to their lives. Of course, they also envy the grandchildren of other old people. At this time, you should tell them that you don't have the courage to have children. You are still a child and not mature enough. If you have children too early, it will bring you great pressure in life, and you still have your own goals in life.