You used to say nobody wrote anything about Jesus for six decades, so after reading my posts you finally learned that claim was incorrect.
But you are still shooting wide of the mark.
The earliest gospel was probably written at least 30 years after the crucifixion, not two decades. But it credibly can be interpreted as the firsthand reports of Peter, as recorded an organized by his companion Mark.
Paul's letters are the Christian writings that are more like about 20 years after the crucifixion.
But in Corinthians, Paul mentions much earlier writings or oral reports about Jesus he had received and passed on to the churches of his mission. Corinthians is written around 50 AD, and Paul began his ministry to the gentiles in the early 40s or late 30s. So these earlier reports or writings Paul received and shared with his ministry arguably go back to the earliest years of the Church in Jerusalem in the 30s.
Wrapping up, we have historical data points showing that there were reports of Jesus going back to the earliest days of the Jerusalem church in the 30s, and the evangelists Paul and Mark were in direct contact with the original Apostles of Jesus.