No, I don't believe the doctrine of original sin. BTW, It was Eve who sinned first, she was outflanked by the "crafty beast". Then Adam deliberately sinned in order to share her fate. Adam and Eve incarnate on a populated, evolved earth. Cain feared people out in the world. The question is do you believe the statements in scripture?
The so called "fall of the earth" was because a trusted celestial administrator Lucifer fell into rebellion looooong before Adam and Eve arrived. Lucifer's assistant Satan convinced the "Prince of our world" to rebel as well. While they all knew the Son, Lucifer concluded that the Universal Father didn't really exist. So they rebelled against Christ.
Anyway, sin is a choice not an inheritance as evidenced by Jesus' charge to "go and sin no more". But it's true we are born into the mess left behind by the rebellion and planetary isolation from the spiritual circuits of other inhabited worlds. So we are influenced by the effect of a fallen world, but sin is a knowing choice to rebel.