Need to switch primary domain

Hi there! I am looking to switch the primary domain for my website from thechristianlife.net to renisonbooks.com. Could you please assist with this?

Right now, renisonbooks.com redirects to thechristianlife.net, and I'm essentially looking to swap that. 

I'm used to managing DNS on GoDaddy's side, not client side, so any help would be great in making sure I don't mess it up!