Not sure what you are referring to? God is never referred to as the first man that I am aware of. The closest things I can come to that is that Jesus was the second man (Adam means man in Hebrew). Either way, Biblically, God always is. There was never any time when god was not.
God is not a man, He is a pure spirit. The Bible states that "In the beginning God" (Genesis 1:1), meaning He was the first BEING in existence. In fact, He is the ultimate reality. One of the most asked questions in the world is, 'Where did God come from?' The answer, to us Christians, is that God has always been here. No one invented Him, or made him - this is very clear to those of us who have studied the nature of God. Your question should be, 'How did God create Himself?' He didn't create Himself, and He has always existed. Creation means to make something from nothing. To create something requires that the creator exist before the thing created. When a carpenter makes a table, for example, he exists before the table he makes. For God to create Himself, He would have to exist before Himself, which does not make any sense. God could not have been created by someone else, because then God's creator would be greater than God. (My answer continues in the comments)
Check out the argument of efficiency and motion. http://web.mnstate.edu/gracyk/courses/web%20publishing/aquinasFiveWays_ArgumentAnalysis.htm I believe that many say that God was first. So logically someone wants to know who was before God. But, think of it this way, what was first is what we refer to as God. With all due respect, but this question is like asking someone who was first in line to get a movie ticket, who was before them? The essence of first is that there is nothing before. God bless
Ignorance made God, or the illusion of God, long ago; in the childhood of the human race. Ignorance found God long before mankind found science; even before the wheel was invented, or fire was captured and made a friend of man. And so ignorance created faith in the face of necessity. And God was born!
God is not a man. He is a power, a 'being', a force who has always Been and always Will Be. He was not created and will never cease. He Is. It is the human mind that insists He must have had a 'beginning' because it is diffucult for us to grasp something without a beginning or end. But God has always Existed and always will. He Was before He made the earth and Will Be forever after the earth no longer is. For a time He chose to walk the earth in human form through Christ His Son and in the very beginning before the sin and fall of man He walked with and spoke to Adam and Eve in some form, possibly human and possibly not. He can and has taken many forms: fire, a dove, a man, brilliant light, pillars of fire and smoke, a ram, etc.
God is not a man, He is God. Adam was the first man, and God created him. But your question is who created God? Well, God is an eternal being. He is the eternal being. He was not created, nor can He be created. God has no beginning, and He has no end. God says "I am the Alpha and the Omega, the Beginning, and the End." He was there in the beginning, "In the beginning, God..." (Genesis 1:1), and He will be there in the end. God is God, the all-powerful, eternal being who created the universe, everything in it, has no beginning, and has no end.