I’m no authority on Calvinism, & they often seem reluctant to share what they believe, but according to the following:
“Calvinists have their own doctrine of prevenient grace, which they identify with the act of regeneration and which is immediately and necessarily followed by faith.[14]”
en.wikipedia.org/wiki/Prevenien … c_theology
"When Orthodox Christians refer to Fallen Nature they are not saying that human nature has become evil in itself. Human nature is still formed in the image of God; we are still God’s creation, and God has never created anything evil. But our fallen nature remains open to evil intents and actions. It is sometimes said that we are “inclined to sin”; that is, we find some sinful things attractive. It is the nature of temptation to make sinful things seem the more attractive, and it is the fallen nature of humans that seeks or succumbs to the attraction. Orthodox Christians reject the Augustinian position that the descendants of Adam and Eve are actually guilty of the original sin of their ancestors.[97] But just as any species begets its own kind, so fallen humans beget fallen humans, and from the beginning of our existence we lie open to sinning by our own choice.
Since the fall of man, then, it has been mankind’s dilemma that no human can restore his nature to union with God’s grace; it was necessary for God to effect another change in human nature."