1 Corinthians 15: 3-8
3 "For what I received I passed on to you as of first importancea : that Christ died for our sins according to the Scriptures, 4that he was buried, that he was raised on the third day according to the Scriptures, 5and that he appeared to Cephas,b and then to the Twelve. 6After that, he appeared to more than five hundred of the brothers and sisters at the same time, most of whom are still living, though some have fallen asleep. 7Then he appeared to James, then to all the apostles, 8and last of all he appeared to me also, as to one abnormally born."
Paul places Peter (Cephas) first. and then a hierarchy of witnesses that seems to be based on his perception of importance in the early church.
Was Paul's explanation correct?
What does Mark say?
Mark 15:40,41.
40 "There were some women there looking on from a distance, among them: Mary of Magdala, Mary the mother of the younger James and Joses, and Salome.
41 These were the women who used to follow Jesus as he went about in Galilee and look after him. And there were many other women there who had come up to Jerusalem with them."
And again in ch. 16:1.2 ...
16 1-2 "When the Sabbath was over, Mary of Magdala, Mary the mother of James, and Salome bought spices so that they could go and anoint him."
Clearly in the early church mythology, these women were at the tomb, and the male followers of Jesus were not there. The materialised angel that is described, speaks to the women, and tells them to go to tell the (apparently male) disciples, including Peter, to go to Galilee and that Jesus would meet them there.
Then, in the Markan account, comes the controversial two endings to Mark. And the so-called 'long conclusion,' states in verse 9,
"When Jesus rose early on that first day of the week, he appeared first of all to Mary of Magdala, from whom he had driven out seven evil spirits. And she went and reported this to his sorrowing and weeping followers. They heard her say that he was alive and that she had seen him, but they did not believe it."
If the 'long conclusion' is correct, Paul was wrong, and Mary was the first witness to this miraculous event.
Why the confusion? If YHWH/JESUS can preserve the Bible as we used to argue when we Jws, then why cant YHWH/JESUS make it clear which is the correct account?
If you'd like to read more widely on this problem, you could examine Dr. James Tabor's discussion of this controversial point. Tabor compares all the gospel accounts and reaches an interesting conclusion.
https://jamestabor.com/mary-magdalene-as-first-witness-and-thus-first-among-the-apostles/