In Hebrew Cain means "acquired". It's really just simple, basic Bible study for the Christian. A non-Christian undoubtedly won't see any of this, and will consider it foolishness, the Bible also says. That's why typically, with a non-Christian, we'd focus on Jesus being the solution to your and my sin problem, and the rest comes after being born again. But since you had asked, that's why I answered :)
The KJV Gen 3:15 says: "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."
That's it;no Jesus, no Savior, no prophecy about anything at all in the rest of the Bible; just that mankind will hate snakes and snakes will bite mankind.
I'm a Christian and I think what you're claiming is HOGWASH!