Today's passage is one the hardest passages to in the Bible. It is one of the two very direct rejections of God's Kingship (the second being when the crowd rejects Jesus on Good Friday).
In Acts 1, we read the story of the Ascension and the choosing of the disciple to replace Judas. We are reminded that Jesus has given us a mission and He is the framework for that mission.
The story of the Ethiopian eunuch is one of the first stories in Acts of the Gospel reaching the Gentiles. God is doing a new work in His church and we get to join in!