Okay I’ll post your favorite passage first
Proverbs 8:22-31 “The Lord made at the beginning of His creation, before His works of long ago. I was formed before ancient times, from the beginning, before the earth began. I was born when there were no watery depths and no springs filled with water. I was delivered before the mountains and hills were established, before He made the land, the fields, or the first soil on earth. I was there when He established the heavens, when He laid out the horizon on the surface of the ocean, when He placed the skies above, when the fountains of the ocean gushed out, when He set a limit for the sea so that the waters would not violate His command, when He laid out the foundations of the earth. I was a skilled craftsman beside Him. I was His delight every day, always rejoicing before Him. I was rejoicing in His inhabited world, delighting in the human race.
Hebrews 1:5 For to which of the angels did He ever say: “You are My Son, Today I have begotten You”? And again: “I will be to Him a Father, And He shall be to Me a Son”?
John 3:16 For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life.
1 John 4:9 In this the love of God was manifested toward us, that God has sent His only begotten Son into the world, that we might live through Him.
You asked about Revelation 3:14 but I’m not exactly sure why? It seems to indicate that the words of the Amen (the Word), the faithful witness, is the first of God’s creations.
Revelation 3:14 “And to the angel of the church in Laodicea write: ‘The words of the Amen, the faithful and true witness, the beginning of God's creation.
Obviously, Revelation 3:14 is speaking of Christ. If we read just a little further down, we read in verse 21…
Revelation 3:21 The one who conquers, I will grant him to sit with me on my throne, as I also conquered and sat down with my Father on his throne.
As for you wanting to know how I understand the Trinity…
It is the view that there is a Godhead consisting of three co-equal, co-eternal persons that make up one divine being.