How can anyone come to a human understanding of God?

You've asked eleven questions. Time to cut to the chase. Seek God with all your heart and ask him, in prayer, to reveal himself to you. Bear in mind that Jesus said no-one can come to God except through him, and that whoever turns to him, he will never turn away. All of that is in the Bible. Try reading Mark's gospel and then praying about what it says. Blessings.