We are confidently waiting for Christ to return to earth when he will set up the Kingdom of God. It is without error, except for copying and translation errors. There is only one God - the Father. The Holy Spirit is God's power. Jesus is the Son of God, and a human being, through his mother Mary.
Man is mortal, having no existence when dead.
By living a sinless life, ending with his sacrificial death by crucifixion, Jesus has opened the way of salvation from death. Belief and baptism are essential steps to salvation. God raised Jesus from death. Jesus is currently in Heaven, on God's right hand. He will one day return.