Acts 2
44 And all that believed were together, and had all things common;
45 And sold their possessions and goods, and parted them to all [men], as every man had need.
46 And they, continuing daily with one accord in the temple, and breaking bread from house to house, did eat their meat with gladness and singleness of heart,
47 Praising God, and having favour with all the people. And the Lord added to the church daily such as should be saved.
Acts 4
32 And the multitude of them that believed were of one heart and of one soul: neither said any [of them] that ought of the things which he possessed was his own; but they had all things common.
33 And with great power gave the apostles witness of the resurrection of the Lord Jesus: and great grace was upon them all.
34 Neither was there any among them that lacked: for as many as were possessors of lands or houses sold them, and brought the prices of the things that were sold,
35 And laid [them] down at the apostles' feet: and distribution was made unto every man according as he had need.
36 And Joses, who by the apostles was surnamed Barnabas, (which is, being interpreted, The son of consolation,) a Levite, [and] of the country of Cyprus,
37 Having land, sold [it], and brought the money, and laid [it] at the apostles' feet.
so, no one can be too surprised after the emphasis of "loving thy neighbor as thyself", plus the underlying message of the Sermon on the Mount and the Epistle of James that the original Apostles and devoted followers of Jesus would choose to share and share alike. The shout out to Barnabas is important, as he will later be described, both in Acts and the Letters of Paul, as designated by the Jerusalem community's leadership to monitor Saul's activities in Antioch, etc., and upon finding hims, joined him in missionary work. And it was Barnabas who brought Saul, who had earlier harassed, and worse, Jesus' followers until converting on his way to Damascus, back to Jerusalem to talk to both Peter and James. And who would later return to Jerusalem to gain acceptance of gentile converts without the need for circumcision, which was granted by James. And then the renamed Paul and Barnabas shook hands with James, Peter and John, pledging to "remember the poor". Eventually, Paul, after a dietary conflict parted ways with Barnabas and Peter, returned to Jerusalem with a collection for the poor. James suggested he get back on the good side with the local Jews by attending ritual cleansing. Paul chose to show up with a large, uncircumcised Greek, which enraged mostly members of the Sadducee sect, whose high priests were involved with the prior execution of Jesus and the subsequent execution of James.
Outside of Paul actual Letters and probably James' Epistle, most of the New Testament was likely written after the Romans had destroyed the Jerusalem Temple along with most of the city, as they slaughtered as many Jews as they could. While there is a tradition that many of Jesus' original Jewish followers escaped to Pelle, the assumption must be that much of this group was destroyed just like the rest of Jerusalem. And that writers immediately after the Jerusalem War were not prone to highlight the Jerusalem Church heritage as the nascent existence of Gentile denominations depended on not antagonizing more Roman animus.
So we don't know that much about those original followers, they're beliefs, and how they implemented Jesus' teachings. There is no doubt that Jesus' brother, James the Just, was the leader. What is most amazing is that much early non-canonized material, including reports from the earliest remembered Christian historians, is that James was one of the few priests who was allowed in pray in the Jerusalem Temple's "Holy of Holies". This would indicate great stature within the City, as well as an ongoing irritation with the Sadducees who ran the place, and who had been collecting much coin for performing the ritualized sacrifices of animals in the Temple until Jesus, John the Baptist and probably the apostles somehow put an end to the foul practice and replaced it with baptism. (In fact, the priests who prayed in the Holy of Holies had long cleansed their own sins by bathing in a mitzvah, which was a bath that was filled with flowing water. Which must have required quite some construction to get flowing to and from the Temple, as opposed to John the Baptist, who found the flowing waters of the Jordan River quite efficient.)