In Hebrew, adjectives usually follow the noun they modify.

In Hebrew, you always put the adjective after the noun. So you would write: She reads book nice.

היא קוראת יפה = She reads well

Yafe in the original sentence refers only to the book, not to the she.

It means "to call" or "to read".

No - קוראת (kore'et) is the singular female form. if you add a "ו" it becomes plural: קוראות (kor'ot).