Great question. Obviously no "Bible", and at this time, not even a scant of a Gospel was being jotted down. Eventually, these eye witness accounts were notated. Then Paul's conversion, and his letters were sent, copied and spread to the Gentile churches. Eventually the Roman Catholic Church, once they legalized Christianity, thought it was a good idea to scrutinize all the letters and teachings, but by now, we are 300 years post life of Christ.
What I believe is that Christianity has unnecessarily created a problem, by believing in the concept that Christians today must have a "Bible", this infallible perfect word of God that not only includes the letters and gospels of the NT but also the Jewish Tanakh, and then believe they must somehow harmonize two very distinct versions of God, the warring angry god of the OT verses the incarnate crucified God who unselfishly allows himself to be the atonement for not only the Jews, but also the Gentiles.
First Century Christians, for them, Scripture was the Tanakh. Yes, the did revere and respect the writings of the apostles and of Paul, but to assume that the NT authors were writing a "New" testament or Tanakh, is speculative at best. First Century Christians, the majority, believed because they heard the gospel, period. Many of them saw signs and wonders performed, that helped spread the gospel. Then, many of those First Century Christians, lived and died with their faith, never having read one single letter, mainly because they were illiterate. Their faith, came by hearing.
Today, Christians have added the concept of the Bible as additional salvific belief. In order to be a Christian you MUST believe that the bible is the infallible word of God. However, there is not ONE instance where Jesus states that to be a believer or saved, that Christians must believe in a future library of letters, yet to be written and along those lines outlined the belief system of those letters.
This doesn't mean that the Bible doesn't have value. But Christians must not place ideas and concepts of belief around the bible that Jesus never said was needed and isn't stated anywhere in the letters contained in the NT.