SIDEBAR: In your Bible studies you also will find the word of God referred to as a sword or a seed.
QUESTION:The Bible wasn't written by God directly, right? So why do people say it is God's word?
John 1:1. In the beginning was the Word, and the Word was with God, and the Word was God. 2. The same was in the beginning with God. 3. All things were made by him; and without him was not any thing made that was made.
Jesus is the word of God.
John 1:14. And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.
So all that is in the Bible is the word of God, Jesus, who is the truth.
QUESTION: From what I've read, yes, it does have things that God directly said, but how in the world can this be a basis of religion? Why do people go by this?
The word of God is not the basis of a religion. It is the spiritual food that gives us life. If you stop eating physically then you will die physically. Those who do not have the word of God in them and study the word of God are spiritually dead (God knows them not).
Matthew 4:4 But he answered and said, It is written, Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God. (also Luke 4:4)
QUESTION: Indeed, it does have wonderful advice and wisdom, but does that mean that a person can attribute all of it to one figure in religion? (peoples contributing to one figure)
I do not think of the Bible as a "how to guide". It is the will of God expressed in words that we can read and listen too. The word of God is Jesus, who says that he came in the name of his father to do his father's will. (John 14:10,11,24) So I do not attribute the act of following God to one figure.
The word of God talks about giving food, shelter, and clothing to the poor. This is a great thing to do but if they are not give the spiritual food, word of God, they shall not be saved. So the poor that need food, shelter, and clothing are spiritually poor/starved.
Matthew 8:8. The centurion answered and said, Lord, I am not worthy that thou shouldest come under my roof: but speak the word only, and my servant shall be healed.
QUESTION: In what ways can this be plausible? From what I've learned in history, the Catholic faith has gone through much corruption through wielding so much power in earlier times, so why is this book not considered thought up of while in that corruption? I know that the Catholic faith wasn't the first church, but it was the most influential. So what I'm asking is why is the Bible the word of God and wouldn't the corruption deal with it?
Not sure what you are asking but John 8 and 1 Corinthians 2 might help.
I have highlighted a few parts of the Bible. But answers to your questions are throughout the Bible. All the best on your studies.