https://youtu.be/PYmC6Xevnv8?si=IbKF8g6oTEF7vLAL The existence of God has been proven even before our generation. In several generations past, God has proven to several people including world powers that He is the Almighty God. There is no reason to doubt the existence of God. Many of those who tried to challenge the authority of God in the past have seen Him reveal His might and power before their very eyes.
The Lord our God is a spirit. He is not a flesh of any kind. Many people worship different forms of creatures which they sculptured with their own hands. They imagine the Almighty God to be in the likeness of some persons who have existed before them. Some others worship some kind of warriors and strong men which have existed in their nation or tribes as their God. All those are not God. The Almighty God should not be in the likeness of any creature.
God proved His existence in the land of Egypt a long time ago. He proved to the whole world that He is the only True God when it terrorized Egypt and brought it down in the presence of all their numerous gods. We can also remember that God proved His supremacy to one of the greatest king in history. That was the Great King Nebuchadnezzar of Babylon. The Lord God made him to eat grass like an animal and lived in the forest with wild beast like animals till he himself acknowledged that the Lord God Almighty reigns in the affairs of men and hand it over to whomsoever He wills.
We should do well to accept and acknowledge that God rules over all the world. When we accept the existence of God it will do well with us. We must worship the True God of the Bible.