frummy, if its torah shebichsav youre curious about then the first step you need to take is to find out who wrote it and under what circumstances. each book is different. for example, the circumstances under which moshe rabbeynu wrote devorim is vastly different than the circumstances under which bereishis was written which is in turn different than the circumstances under which megillas ester was written.
i suggest you begin by learning about the circumstances under which each seyfer was written. we can then have an intelligent discussion about whether mordechai wrote under ruach hakodesh or something else and who wrote what when and how. then you need to learn the canonization process by which ezra chose which books are torah and which are not. it appears to me that you lack the basic and fundamental understanding of what the torah actually is.
moreover, living a life as a torah jew is not really incumbent upon the literal words of the torah. it is torah shebeal peh that dictates the life of an observant jew notwithstanding anything it says in torah shebichsav. if youre questioning life as a frum jew, it is torah she beal peh you need to research not torah shebichsav.