As just a couple examples:
Actually, indeterminism is the opposite of determinism.
There is a massive multicentury debate about whether determinism and free will are compatible. It seems that Molinism demonstrates that they, in principle, are compatible.
In physics there is a similar and unresolved debate about whether the universe is deterministic or indeterministic.
Taking this formulation literally, when whenever we are doing God’s will, it is not by free will.
Then why would God allow it? Why God create the opposite of God’s will?
It very much appears my dog has free will. It is hard to imagine Homo sapiens without a sense of free will that is not exactly identical to ours.
I will get to this when I can. I suspect it will take a while. I’m also not sure how helpful it will be to you until you let go of the “free will” term, and can introspect a bit on how your arrived here. I think there was a wrong turn along the way, but until you back out of it, it will be hard to see.
As a clue, that I doubt will make sense to you yet, I think you are trying to explain what makes Adam’s sin the first transgression. I think the answer is that he was the first to receive a command. You can’t break a command if you never received it. Aligned with this, Adam acquires knowledge we can increase the types of evil he can do. It is not that he has new free will, but that he know nows how to exert his will in transgressive consequential ways. Those two lines, it seems, give you what you are trying too get at in a more grounded way.