Before Paul became a missionary God was already preparing him for a life of ministry. When Paul was growing up he grew up in a big city called Tarsus of Cilicia which helps him to prepare him for lots of things for the future like preaching to a lot of people and a lot of different things. Also, Paul was a Pharisee growing up which also prepared him for his life of ministry because when he was growing up he had to learn scripture which then he could use that information about the gospel to speak to others. I think God could preparing me for ministry just my how I can speak Spanish which then I could talk to other people in Spanish about God and what he has done for us and how he has saved us from our sins.