Jesus sends out the twelve. Matthew starts by saying, "First, Simon. . ." It is one thing to begin the list, that's emphasis enough, but he makes even more explicit the prominence of Peter by saying, "First".
Jesus is very clear in his instructions, down to the tactics for each home and the way to speak before judges. This is a strong example of the importance Jesus placed on equipping. It was not okay for the disciples to go into these cities and do things any way they wanted!
A disciple should be like his master, not least in that they should be disliked by the same people!