I understand that the LDS church teaches the concept of eternal progression, that "As God is, so man can become and as man is, so God once was." So, men may attain godhood in exaltation.
By implication, God the Father was once a man Himself on another planet where there was another god and attained to godhood Himself through his life on that planet.
So, my question is, according to LDS teaching, who was the first God who began all this--the uncreated God, since all other gods, including God the Father would have been born spiritually through a spiritual union between the god of the previous planet and one of his wives.
Also, is there any worship given in the LDS Church to this first God?