Maves, nice to meet you. I have been a Classical Calvinist for decades now. I was an Arminian prior to becoming a convinced Calvinist. So, I hope I can answer your questions and help you work somethings out. First thing I noticed about your comment above, which is a very common consensus, is that a lot of people confused Hyper-Calvinism and Classical Calvinism. In Classical Calvinism it teaches, that God is not the author of sin, this falls under Hyper-Calvinism. I will use acronyms CC (Classical Calvinism) and HC (Hyper-Calvinism) going forward. In CC, God does not coerce Adam to sin against his will, this will make God the author of sin. Adam fell by his own volition. CC also teaches that God allowed to permit the fall, by allowing Adam to fulfill the Covenant of Works made between God & Adam in the Garden Temple with Obedience or Disobedience. One Act comes with Blessings and Eternal Sabbath (Life) rest with God, the other Act comes with sanctions of curses and death. Take note that Scripture states that God created Adam in an upright standing. He was created righteous and good, with a free-will to obey or disobey God. Which is why God made a Covenant with Adam to fulfill with obedience and spread God's glory through the earth.
Now in HC it teaches that God ordained (wanted the fall to happen) Adam to fall, which makes God the author of evil. Because Adam did not have a choice. Basically was coerced to sin or designed that way. But this is not Scriptural at all. Scripture is explicit in teaching God is not the author of sin and evil.
I don't know how familiar or your level of Biblical knowledge is, but one needs to know the beginning to understand the rest. Knowing the impact of the fulfillment of this Covenant with God is crucial to understanding the the rest of Biblical history. Adam was appointed by God as the human race representative. Like a President representing the US. His actions affect us all in con-solidarity. If the President declares war, we are all at war. He is our leader-head, and he actions affect every single American. I'll touch on this more later.
Ponder upon what I have written so far, and write any questions or concerns you might have.
Excellent question, I am glad to see people genuinely seeking answers. Yes Adam and Eve's eyes were open once they disobeyed God, by eating he forbidden fruit, knowing this they ran and hid from God. God search for them, ask why are you hiding. Because we saw we were naked. God said how do you know this, pointing out that they disobeyed him. God cursed them and were sanctioned with exile and death. But immediately after this God made another Covenant; a Covenant of Grace in which a Savior would come to rescue them from their sins through a seed through Eve.
Genesis 3:15 says, “I will put enmity between you and the woman, and between your offspring and hers; he will crush your head, and you will strike his heel.” This is known as the
protoevangelium—the first gospel. The verse introduces two elements previously unknown in the Garden of Eden, elements that are the basis of Christianity—the curse on mankind because of Adam’s sin and God’s provision for a Savior from sin who would take the curse upon Himself.
And yes, the Gospel is offered to every living creature as commanded by God. This is called the external call. Please again write down any questions or concerns you might have for me. I will address half of your post, and then other half later. If you don't mind. There's a lot to unpack here.
Another great insightful questions. Yes, exactly Jews have the Stone Tablets and Gentile have the natural Law. So that nobody is without excuse.
Okay, I'll stop here, because this is a place where you are going to have to do a lot of reading, studying, and research. Ask yourself, what did the fall cause? Describe if the disposition of the fallen human race. What is sin, and what were the ramifications of it. Describe is a sinner? What does Scripture say about our fallen condition? Are sinners enemies and hostile toward God? Is God and Man sworn enemies? Why is a Mediator needed between God and Man? Are sinners rebellious against God?
I ask these question because having a weak view of the gravity of sin leads to a weak view of God's Amazing Grace.
I'll be waiting for your reply.
By Grace Alone in Christ Alone!