Is the Trinity in the Gospel of Mark?

What are the scriptures that the gospel Mark is teaching about God? Is the Trinity in Mark? — Is Jesus Christ God Almighty, and also God the Son, or is he the Son of God, the Messiah, and the Son of Man? Is the holy Spirit portrayed as a person in Mark?
Mark 1:1 – “The beginning of the gospel of Jesus Christ [the Son of God]” (NAB). “Some important manuscripts here omit the Son of God” (NAB note on Mark 1:1). One important point that we can glean from this is that no manuscripts of Mark 1:1 call Jesus ‘God,’ or ‘God the Son.’