If obtaining a body is a requirement to obtain godhood, how was he able to become a God prior getting a body?
Really you have to understand a couple of other doctrines. Mostly reading Section 93 teaches us how Jesus Christ became God.
I look at it more like Jesus's Calling (same with the Holy Ghost). Like in the church today when I get a calling I get the power given to me for that calling. (I am set a part for it). The same holds true for Jesus Christ. Because he qualifed for that calling, he was called to be part of the Godhead.
Jesus Christ didn't have any power of himself, his power came from his Father in Heaven. The power to Create worlds, wasn't Christ's power, it was God's power given to Christ for that purpose.
As Christ came to earth, any power he has was still because of what his Father gave him. This doctrine is called Divine investiture hxxp: www. mormonwiki. org/Divine_investiture
But as Christ passed through mortal life, he overcame the things of the flesh, grew closer to Heavenly Father. After Christ died and had passed through mortality, Christ had then become a God in his own Right. The power was then given to him, he now had his own power.
The same holds true for each of us! We pass through this life, qualify ourself for God's power.