Judaic Christianity, we must believe and teach monotheism as God Himself asserted in Dueteronomy 6:4, "Hear, O' Isreal: The Lord our God is one Lord." Any other direction would be Greek, Latin or Roman perversion. James resounds this in James 2:19, "Thou believest that there is one God, thou doest well. The devils also believe and tremble."
The person of Jesus Christ does not reveal another god, nor God the Son, but rather the Son of God. The Son was not in the Son, but the Father. The Son was not made flesh, but rather the Word - St. John 1:14. Which also John says in 1:1, "the Word was God". Complete agreement is found in I Timothy 3:16, "God was manifest in the flesh..."
Yes, the same God that spoke the world into existence, walked on it in the body of Jesus Christ. In flesh, the Son of God who died on the cross, but in the spirit, God the Father All-Mighty, omnipotent, omniscient, and omnipresent.
The Apostolic Church from the Day of Pentecost has always administered baptism by immersion in Jesus' name. Exactly what the early church in Acts 2:38, 8:12-16, 10:48, 19:5, has not changed through every century through this day. The only way to baptize one in a singular name, which is the name of the Father, Son, and Holy Ghost is to baptize that person as the Apostles did, in Jesus' name, See Luke 24:45-48.
The baptism of the Holy Ghost is the "promise of the Father", Luke 24:49. It is just as available today as it has been through out every century since AD 33, see Acts 2:1-4. There are many signs of the baptism of the Holy Ghost, such as gifts, fruit, and holiness, but the initial sign shown in the Bible is tongues. Acts 10:45-46, "...on the Gentiles also was poured out the gift of the Holy Ghost, for they heard them speak with tongues.", See also Acts 19:6. This should never be confused with the gifts of tongues in I Corinthians 12:10 which must be interpreted that the church be edified, I Corinthians 14:5.
Holiness foremost is NOT legalism, but love. The desire to please God by turning from the world to being more like Jesus is more than just inward, but complete inside and out. Romans 12:1-2, I Corinthians 6:20, II Corinthians 6:17-18, II Corinthians 7:1, I Peter 1:14-16.
The Second Advent is the absolute literal and physical return of Jesus Christ to earth. "As he left he will come again" Acts 1:11. Jesus promised it, John 14:3, Paul affirmed it, I Thess. 4:15-17, and we look for it.