The part that got me was early followers of Jesus came together to figure out what it means to be a Christian".
I think it was more like making sure everybody was on the same page so to speak. The non Christian world doesn't understand that Christ builds the church and sustains it through the Holy spirit. They have to resort to some Dan Brown fiction like Constantine establishing the church.
Yeah, you hear that balderdash from time to time, that the founder of Christianity was Constantine. The Emperor was the only one who could issue safe-passage letters to the invited bishops--- the successors of the Apostles --- from across his realm, but he did not claim to "determine" doctrine.
He himself was not baptized until he was on his deathbed.
We don't owe the Nicene Creed to him, but to the Holy Spirit.