Attempting 2 AG's on your first day may be rushing things - you're going to learn a lot about your equipment (heat transfer, retention, evap. rate) and you'll undoubtedly have process questions that you'll want to research. And, you'll want to factor all of this into your next batch. So, I'd recommend starting with the Coldwater 420 (cheaper - less grain, less hops).
But, whatever you decide - have fun!
Atomic Dog Brewery
On Deck: Centennial IPA, Dry Irish Stout
P: Cascade Pale Ale
T: Carbed Crystal Light, Root Beer, Vanilla Cream Soda, Tripel IPA, Apfelwein
e^(pi*i) + 1 = 0