We first read of Him in Genesis.
Later David mentions Him in a Psalm.
Hebrews mentions Him, then chapter 7 of Hebrews gives us the most info we have about Him.
Please read the following verses.
24 but because Jesus lives forever, he has a permanent priesthood.
25 Therefore he is able to save completely those who come to God through him because he always lives to intercede for them.
26 Such a high priest meets our need — one who is holy, blameless, pure, set apart from sinners, exalted above the heavens.
27 Unlike the other high priests, he does not need to offer sacrifices day after day, first for his own sins, and then for the sins of the people. He sacrificed for their sins once for all when he offered himself.
28 For the law appoints as high priests men who are weak; but the oath, which came after the law, appointed the Son, who has been made perfect forever.
When you get a chance, read the whole 7th chapter of Hebrews.
I believe in Genesis, Melchizadec is the appearing of God. And when God appears in a human form, this is Jesus.
Now look at Genesis 14:18, Psalm 110:4 and Hebrews 5, 6 and 7 and see what the Spirit of God leads you to believe.
I believe you will come to the same conclusion as many biblical scholars.
Melchizedek and Christ are one.