Andrew, Simon Peter’s brother, was one of the two who heard what John had said and who had followed Jesus. The first thing Andrew did was to find his brother Simon and tell him, “We have found the Messiah” (that is, the Christ). And he brought him to Jesus. Jesus looked at him and said, “You are Simon son of John. You will be called Cephas” (which, when translated, is Peter.)
Or nowadays we might translate it as 'Rocky' for cephas means 'rock'. Notice finding Peter was the first thing that Andrew did. What was the first thing that you did when you were converted? I think the first person I told was a fellow consultant, Bill Tattersall. He was rather embarrassed (disarmed, in tatters even). We must not be deterred by that. We are all doomed on this little planet and we Christians have been given a means of escape. Are we so callous that we should keep it to ourselves?