What Is the gospel of Luke 3:1-6 saying? Interpretations?

The gospel of Luke chapter 3 verses 1 to 6, it basically implies about John the baptist. There are some who argue that this might be the official beginning of the gospel as to how it was started, but there is not concrete evidence to prove it. The gospel was started off with the the start of John's ministry. The people mentioned were people of high calibre, authorities over people and lands, and are so called to be VIPs to the society at that time. Tiberius, Philip, and Lysanias were mentioned serve only to date the beginning of John's ministry while Pontius Pilate, Herod, Annas, and Caiaphas were mentioned because they will play an important part upon the crucifixion of Christ. The gospel also tells us that the Lord chooses unlikely people to be his instruments in promoting salvation, thus the mention of John being called in the wilderness. Repentance is involved in preparation to salvation and the forgiveness of sins would pave the way for it. As what the prophet Isaiah has said, it was just the way how everyone should prepare for the coming of the Lord, the King. We are all to be ready at the coming of our Lord.