Can you recommend a book similar to the fantasy novel that I read a few years ago?

The female protagonist's predecessor seemed to be in a hurry to achieve success because her cultivation talent was too poor, and she exploded and died during the advancement process. After the female lead passed through it, she opened a ring on her finger. It was called the Dragon Abyss Ring or the Abyss Ring. The female lead's surname seemed to be Su. She was the eldest daughter of a large family. Only her grandfather loved her. After that, the female protagonist went to the academy. The female protagonist was originally in the trash class, but she had a good friend who was in Class A. Oh right, she also had a few brothers and sisters in Class A. That good friend and the female protagonist were roommates, but later, it was mentioned that this pretty girl who was very popular in the academy was actually a man, and she seemed to have a very powerful background. She came to the academy for something that her clan needed. He cared a lot about the female protagonist. Because the female protagonist did not know his gender, they were very close during their cohabitation. That person had even combed the female lead's hair. Later on, it seemed that the female protagonist went to the forest with a group of people to train. In the middle, the female protagonist showed her skills and made a very common medicine in modern times. She was worshipped by someone in the team who was obsessed with medicine. During the training, the younger brother of the female protagonist's family changed his opinion of the female protagonist. Later on, the group of people encountered a powerful magical beast in a cave. The female protagonist had no choice but to take action. After killing a magical beast that looked like a big spider, the female protagonist and the team dispersed. The female protagonist passed through the cave and came to a valley. There was a powerful fire phoenix inside. It was going to kill the female protagonist, but later it recognized the female protagonist as its previous owner through the ring on the female protagonist's finger and signed a contract with her. That's all I've seen. Please name the novel!