Something I recently learned is that Christianity is unlike any other religion. This difference even set Christianity apart from the other Abrahamic faiths of Judaism and Islam. Christianity is a religion based on belief and not on practice. Even practicing Jews have learned to answer "What do you believe" when asked by Christians because originally the question was a foreign concept.
We find in the Gospels that there are many differences in what the Jews of Jesus' day believed. Some, like the Sadducees, believed there were no spirit creatures other than God and there was no resurrection. The Pharisees on the other hand did believe in angels and a resurrection. They all offered sacrifices to God at the temple. They all attending the synagogue to listen to the law being read. They all obeyed the Sabbath. That was their practice. Because religion is a practice...unless you are a Christian. Then it is all about belief.
The first Christians were practicing Jews who added Jesus' teachings to their practice. This practice evolved even in the New Testament. The New Testament and the entire Bible stops, but Christianity kept evolving. Those changes are recorded, but just not in the Bible.
Those who are obsessed with trying to recreate the original Christian congregation fail. Those original 11 Apostles + Matthias changed their beliefs and practices. The Apostles who replaced those 12 Apostles did so likewise. They had to. As a religion grows its membership the religion natural changes.
To begin with the premise that 1) If it is not in the Bible it is not true and 2) If the Bible does not command/sanction something it is unacceptable practice to God is a logical fallacy. There are many recordings by Christians of the 1st and 2nd centuries of how they practiced.
Do you object to the celebration of wedding anniversaries? Do you object to the wearing of wedding rings? These are practices of a non-Judeo-Christian origin. So are these "pagan" practice that should be avoided?
Finally, read only the teachings of Jesus. Jesus on several occasions rebuked the religious leaders of the true religion of the day, Judaism, because they were concerned with rules and regulations rather than carrying for others and being content with basic necessities.