There are a few books after the gospels that talk about what the disciples did after Jesus' death, but I would suggest Acts, in the New Testament.
The disciples were both confused, afraid, angry and sad about Jesus Crucifixion because they had not fully understood Jesus' explanation about his upcoming death and resurrection.
In the Gospel of Luke, 13 - 53, two disciples of Jesus met, spoke and ate with him after his crucifixion and resurrection, then told others about the event. Jesus' followers believed the witnesses and so more readily believe in the resurrection themselves.
As far as I know Mark went to Egypt after the crucifixion.
Because they had been with him for around 3 years and witnessed his life, his teachings, his crucifixion and resurrection and were told to go out and testify and make disciples!
After the death of Jesus on the cross, Jesus told the disciples to look after her.
There was not a "Resurrection Dinner", per say. The eleven remaining disciples (sans Judas Iscariot) were gathered, mourning the death of Jesus, in Jerusalem. Jesus is said to have appeared amongst Them. They thought Jesus was a ghost, until He asked for food. He was given a broiled fish. Hardly a dinner, however it is the only time when food was eaten, post-Crucifixion, that was attended by Jesus and The Disciples. If You are referring to the Last Supper (pre-Crucifixion) there were thirteen men seated at the table; Jesus and all twelve of the male disciples. Bear in mind that there were also female disciples, Mary Magdalene being foremost of Them. However, according to Jewish traditions of the day, the female disciples would not have been seated with them; They would have been there to serve the food.
Our hope for the future is guaranteed by the resurrection of Jesus.
his crucifixion and resurrection, his teachings and miracles
Easter celebrates the resurrection of Jesus, three days after his crucifixion.
his disciples, before Jesus ascended into heaven
The disciples were meeting together in a room on one of the occasions when Jesus appeared to them after the Resurrection.
Pual and judea