According to Jesus the holy spirit would help the disciples and comfort them.
It was Gods will.
yes
They were scared and confused, as they were suddenly with out their Lord Jesus. And afraid that the Romans would crucify them as well.
When Jesus was ministering on earth, He and His followers were considered as a "sect". When Jesus was arrested and crucified His followers became afraid and thought that they also would be arrested and crucified and so they hid themselves and locked the door.
desciples
A certain William Miller - and his followers - believed that Jesus Christ would return in 1844. The Great Disappointment means that the foretold time passed, and William Miller and his followers believed that Jesus Christ had NOT returned.
He must have or God would have destroyed the Earth a long time ago.
Jesus said that His diciples would teach the world about God.
Jesus meant that they were fishers of men, and that means that Jesus told them to spread the good news.
Do you mean "How would Jesus teach during his time?" well that is easy? He preached peacefully while using peaceful demostrations of his power. He never harmed, insulted or threatened anyone. He used kindness and comfort to teach.
Jesus taught that the Kingdom of God will grow with proper care and feeding.
The first Jew, according to Jewish tradition, was Abraham, who lived around 4000 years ago. The first Christian is unknown, but would have been the immediate followers of Jesus.