Jesus said, "Go into all the world and make disciples of all nations, baptizing them in the name of the Father, and the Son, and of the Holy Spirit." Matthew 28:19.
Baptism is symbolic. It symbolizes the death, burial, and resurrection of Jesus and our own relationship to His victory over sin, death, and the grave, Roman 6:35.
Holy Communion is a sacrament that commemorates Jesus' Last Supper with his disciples. The ceremony of Holy Communion is given to us by Christ Himself so that we might remember and participate in His last supper with His disciples. He commands us to observe it. Do this "in remembrance of me," He says. (Luke 22:19; 1 Corinthians 11:24-35)