Fantasy reincarnation thingy

Girl goes to fantasy book she read where she tries to seduce the father of the villain to save the character. Slowly they fall in love and the fiance who uses dark magic wants to use the king and his divine blood to do some shit. The main gal cant get use to the mana and magic so she can die easily and the god wants to save her and will take her on in five years as a student to help her soul connect to the land.

Blonde dad that hates her daughter starts to care for his daughter. Dad hot af

girl reincarnated to a novel takes over the roll of her brother so she can save herself and her fathers life. In the novel she read the brother had been taken by the villain and became one of his knights. Later on he tries to assassinate the brother which leads to the death of him and his family. She stops this by allowing her brother to leave and taking his place in the enrollment to become a knight. She hides her skills within fighting and training so that the villain doesnt seek her out.