Hello, I have a question: who were the first two disciples?

"Again, the next day, John stood with two of his disciples. And looking at Jesus as He walked, he said, "Behold the Lamb of God!" The two disciples heard him speak, and they followed Jesus. Then Jesus turned, and seeing them following, said to them, "What do you seek?" They said to Him, "Rabbi" (which is to say, when translated, Teacher), "where are You staying?" He said to them, "Come and see." They came and saw where He was staying, and remained with Him that day (now it was about the tenth hour). One of the two who heard John speak, and followed Him, was Andrew, Simon Peter's brother" (John 1:35-40).

A disciple means a student, just as rabbi means a teacher. Jesus first two disciples were Andrew and an unnamed disciple. The unnamed disciple is very likely John because throughout his account, he avoids naming himself. See John 20:2-3, 8 as an example. However, his presence is implied in his detailed knowledge of the events, even to the point of recalling the hour they first followed Jesus.

See also:

"The Beginning of Jesus' Ministry" in The Gospel Accounts: A Chronological Study
Questions and Answers regarding the Gospels
Questions and Answers regarding the Apostles