If I hadn't been raised in a Christian home and studied Christian doctrine all of my life I, too, might find myself with a whole host of questions. Nor do I mean to imply that I have everything figured out (because I don't), but what I do believe makes sense to me, rationally, morally, experientially, doctrinally.
My short answer to all of your queries is: Jesus is the way. Don't bother with other scriptures, not even the Old Testament because it ultimately points to Jesus. Once once you come to know and understand Jesus, even some of those confusing Old Testament laws and actions begin to make sense.