Finally, do you think God would choose a sinful vessel to become Man for our salvation?
The prophets, apostles and us are your so called sinful vessels. God has always used sinful vessels for his purposes.
Regarding free will. Do we have absolute free will or does God have absolute free will? We both cannot. So that means our “free will” is subject to God’s discretions. Did Israel have an say in being chosen by God? Did the prophets have any say in being chosen by God?
Jonah tried to not participate, didn’t work.
God is God and we are not. God is sovereign.
God commanded Mary and told her what was going to happen,
Your emphasis on FREE WILL needs further thinking.
You also need to do further reflection on what is “Gods Work” I don’t think you really know what it means.
Are you really serious? You think God is limited in what He can do?
How little faith.
How do you explain Lucifer?