Is it possible to make a decision/choice that God doesn’t already know the result to?
No. He knows everything from the beginning to the end. Yes you have freewill but only God knows the outcome.
Your question doesn't make any sense.
God is not confined by time or space.
just because God already knows what we will choose does not mean that we don't have free will... He's outside of time... He knows the result... that does not have any bearing on the result...
Think of it this way:
You know that if you put your hands on the fire, your hands will surely burn.
You tell your child their hands will burn, too, and give the directions to stay away from the fire, so their hands don’t burn.
But, ultimately, it’s their decision whether or not to obey. You already know what will happen if they disobey....but, you haven’t removed from them the temptation for their entire lives. You may place obstacles in their path, but, sooner or later, because they still have free will, they may ultimately find a way to play with the fire....whether in secret or in the open. And if they make that choice, they will get burned.
Because you knew the result ahead of time, didn’t take away your child’s free will....to obey or disobey. And just because you KNEW didn’t make your child a puppet, either.
The physical creation in which you exist and can sense has a built-in ‘uncertainty’ factor which mkaes possible your exercise of free will. That is the level of reality with which you are called to deal. Leave being God up to God, you are a created being.