I Can Level up by Killing Monsters.

For example, a second-level cultivation can be used against first-level monks, while a third-level monk can be used against second-level monks. What do you mean by this?

You have a lot of typos and your sentences are not smooth. For example, that brother took good care of me when he first entered the sect. It is written that he took good care of me when he first entered the school. This is a bit modern. Spiritual power/qi is also a kind of internal power.