After you give me Scripture that says Adam was not the first man.
Genesis 1:26 And God said, let Us make man in Our image, according to Our likeness; and let them rule over the fish of the sea, and over the birds of the heavens, and over the cattle, and over all the earth, and over all the creepers creeping
on the earth.
1:27 And God
created the man in His own image;
in the image of God He created him. He created them male and female.
Genesis 2:2
And on the seventh day God completed His work which He had made. And He rested on the seventh day from all His work which He had made.
2:3 And God blessed the seventh day and sanctified it,
because He rested from all His work on it, which God had created to make.
Gen 2:7 And Jehovah God
formed the man out of dust from the ground, and blew into his nostrils the breath of life; and man became a living soul.
2:18 And Jehovah God said, It is not good,
the man being alone. I will make a helper suited to him.
2:21 And Jehovah God caused a deep sleep to fall on the man, and he slept. And He took one of his ribs, and closed up the flesh underneath.
2:22 And Jehovah God
formed the rib which He had taken from the man
into a woman, and brought her to the man.
Gen 4:13 And Cain said to Jehovah, My punishment is greater than I can bear.
4:14 Behold! You have driven me out from the face of the earth today. And I shall be hidden from Your face. And I shall be a vagabond and a fugitive on the earth.
And it will be that anyone who finds me shall kill me.
4:15 And Jehovah said to him, If anyone kills Cain, he shall be avenged sevenfold. And Jehovah set a mark on Cain, so that anyone who found him should not kill him.
4:16 And Cain went out from the presence of Jehovah. And he lived in the land of Nod, east of Eden.
4:17
And Cain knew his wife, and she conceived and bore Enoch. And he built a city, and he called the name of the city according to the name of his son, Enoch.