It makes no difference to you and the world whether you believe or do not believe in the existence of God, a god, a goddess, a pair of a God and a Goddess, many gods and goddesses OR NO GOD OR GODS OR GODDESSES AT ALL!
What makes the difference is what you think yourself to be. A worshipper, a master, none of these or a combination of any of these.
Further what makes any difference and becomes important is, if you consider yourself an intelligent living being who can make the difference in the natures mastery on the universe by helping it and conserve its qualities, keeping the environment green and unpolluted by the industrial all consuming progress, by prolonging the lives and habitats of wild and domestic animals in forests, seas and skies, educating and finding equal opportunities for the economically weak people, stay away from hatred, killings of innocent, and with whatever means you have found in life to contribute to charity and philanthropy, then you are what is described in all religious and spiritual tenets and dogmas and doctrines and scriptures as a God. Not liking this description? OK, you are a very rare person! YOU ARE AN INSPIRING HUMAN BEING! A LEADER!!