After I Transmigrated into a Book, I Clung to the Female Lead's Coattails

Nineteen-year-old Yang Xi has no parents and grew up in an orphanage. She went out to work after graduating from junior high. Then, in a twist of fate, she transmigrates into a book, becoming Ling Zixi, the second female lead in the last novel she read. In the original story, Ling Zixi is the heroine's adoptive younger sister. The heroine is the family's adopted child, and everything goes her way, bringing her success in both career and love. But for some reason, the second female lead insists on fighting the heroine for a man, and eventually dies in a car accident. Knowing how the story ends, Yang Xi decides to cling to the heroine and let her lead the way. She doesn't need a perfect romance, just a successful career. The only problem is that she transmigrated a little too early, so she'll have to start by studying hard.

This is a new writer's first book, so please feel free to offer advice. I promise to keep updating and won't abandon the story!