You simply don't know how to read the Scriptures. Salvation through Jesus does not come through believing every single word of Scripture as historical fact.
But, I'm not going to try to change your mind. Just putting a stake in the ground here.
***You simply don't know how to read the Scriptures.***
In Romans Paul states...
"Therefore, just as sin came into the world through one man, and death through sin, and so death spread to all men because all sinned-- for sin indeed was in the world before the law was given, but sin is not counted where there is no law. Yet death reigned from Adam to Moses, even over those whose sinning was not like the transgression of Adam, who was a type of the one who was to come."
If there was no literal Adam who committed the first literal sin and brought literal death on all mankind then Paul is DEAD WRONG in his theology. And, mind you, this is no small point of Paul's soteriology.
If Paul is dead wrong on this critical fact about the death of Jesus then how can you be sure he is right about anything else?
Jesus coninually spoke of Adam as a real historical person. Jesus continually refered to the account of creation as literally, historically true.
If Jesus was wrong about creation - wrong about such a central event in the Bible, then how do you know he's not also wrong when he says,
"Verily, verily, I say unto you, He that believeth on me hath everlasting life."
I submit to you that if what you believe is true, you CANNOT know that he was not wrong and that your faith, therefore, is just mere personal opinion and preference.
I emplore you to take the time to look up the verses in the Gospels where Jesus refers to creation and seek to discern his opinion of the event - whether he views it as allegory or literal truth.