You're right; there are several different literary styles in the Bible.
Genesis is not written symbolically, nor as parable, nor poetry, etc. Again, Jesus referred to it as historical fact, as did the OT prophets and the disciples.
You still didn't tell us where you got the idea the fruit of the tree was an apple.
Again the point of Genesis was that all of creation was from God. At the time of Jesus the little history that people knew was that Kingdoms were conquered by other kingdoms and the current rulers were not the founders. For example Israel , the Kingdom of David , was conquered and now ruled by Rome. So what about creation. Who made it? Did the God of Israel find it? Take it over from someone other. No. The answer that Jesus gave and taught over and over through his ministry was that there was but one God and that he was the Creator of all, which is the heart of the Genesis message. Jesus reaffirmed the message of Genesis. As far as is known He never sat down in a seminar and deconstructed his parables, symbols nor did he dissect the Scriptures as one does today other than to disparage and humiliate those who sought to justify themselves with the common “It is written...”
“Genesis is not written symbolically, nor as parable, nor poetry, etc.”
Indeed, the Bible usually very clearly delineates those sections. When Jesus tells a parable, the Bible says something like “and then Jesus told them the parable of ...”, or a postscript is attached explaining that the story was a parable. When the prophets see a vision, they wrote down stuff like “and then the Angel of the Lord showed me a vision of ...”. So we are not left to wonder what parts of the Bible are symbolic or allegorical, although that is what the Biblical fantasists would like.