What do we know about Nimrod? First, he is a sinner. After the fall of man, there are only two types of humans; sinners and sinners who found grace in God’s eyes.
After falling from their estate, God promised to Adam and Eve, that He would “And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.” Genesis 3:15. This is the promise of one to come, who would defeat satan (bruise thy head) although satan would have Christ crucified (bruise his heel).
Genesis 3:21 “Unto Adam also and to his wife did the Lord God make coats of skins, and clothed theem.” God clothed them in His righteousness (Hebrews 9:22 – “without the shedding of blood there can be no remission of sin”).
Abel, “By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained witness that he was righteous, God testifying of his gifts: and by it he being dead yet speaketh” Hebrews 11:4.
“But Noah found grace in the eyes of the Lord.” Genesis 6:8. Later, “But with thee will I establish my covenant; and thou shalt come into the ark, thou, and thy sons, and thy wife, and thy sons’ wives with thee.” Genesis 6:18.
These were all sinners, redeemed by God, through faith in the promise given to Adam and Eve and confirmed in the sheddidng of blood. Looking forward to the Messiah, they were “born again” in new testament terms.
As for Nimrod, he was a sinner who continued in disobedience. There is no biblical evidence of his turning to God.
What was God’s command to Noah, Shem, Ham and Japeth? “Fruitful, multiple, replenish”. Go! Spread out and “subdue” (Genesis 1:20) the land for God’s glory and man’s best interest. Learn how the world works and use it. Learn about agriculture, astronomy, biology, chemistry, mathematics, phsyics, psychology, sociology….etc. because these will glorify the One that has redeemed you.