The story of Solo Leveling is about a weak hunter named Sung Jin - woo. In a world filled with dungeons and monsters, he starts off as an E - rank hunter, which is the lowest rank. But he gets a mysterious system that allows him to level up and become extremely powerful over time. He faces various dangerous dungeons and strong monsters, and gradually rises to become one of the most powerful hunters in the world.
You can start from the chapter where the anime ended. Usually, there are online forums or manga communities that can give you the exact chapter number.
Well, in the 'solo leveling full novel', Sung Jin - woo starts off as an E - rank hunter, which is the lowest rank. But as he progresses with the help of his leveling system, he not only gets stronger physically but also gains new abilities. He has to deal with various types of monsters that come out of the dungeons. There are also political and power struggles within the hunter community. And as he levels up, he uncovers some secrets about the origin of the dungeons and the true nature of his power. He gradually becomes a key figure in the fight against the threats that the dungeons pose to the human world.