There is no “original Bible.” Different sects of Christianity have different canons that they consider “scripture.”
Most Protestants adhere to 66 books divided into the “old” & “new” testaments. Roman catholics include several more books commonly called the “apocrypha” or “deuterocanonical” books.
Various traditions in the Eastern and Oriental Orthodox sects such as the Syriac Orthodox church or the Ethiopian Orthodox Tewahedo Church include even more books and depending on the specific tradition, don’t even have a closed canon of official scripture. They don’t really think of scripture in terms of being officially canonized, it’s more of a spectrum from “more authoritative” to “less authoritative.”
There was no defined canon for any of the early Christians for several centuries. Early Christians circulated many different epistles, religious poems, stories, legends, sermons, and parables, often just by oral tradition.
Some, like the gospel of Mark, are considered fairly historical by many scholars, others are more fantastical or don’t have as solid historical attestation.
There is active debate amongst scholars about authorship of the now canonized Biblical corpus and the level of historicity.
Take the Bible for what it is; an impressive and important historical work, really a small library of ancient literature. It’s not a magical text though, it was written by people in very specific sociological and historical contexts and should be studied and examined with those in mind.
If you find it enlightening and inspiring to your life and it helps you be a better person to others, that’s great. And if you attach special spiritual or religious meaning to it, that’s your call. But that doesn’t change the nature of what the Bible is and where it came from.