Welcome!
I'm raising my first chickens too and don't have any eggs yet, but I think the previous poster has given some good advice.
I've got 13 hens, which we got as day old chicks. It's a lot more work when they're little, but also a lot of fun too (especially if you have kids) and you can be sure they're started as organically as possible. If you do that I would recommend starting with a medicated starter feed to control coccidiosis and then gradually adding in non-medicated organic feed. That worked really well for my girls, I only lost one early on (when they were on 100% medicated feed) and they are thriving.
You may consider getting a few more hens than you think you want, it's normal to lose a few if you get them as chicks and it can be a hassle to add to your flock later from what I've read. We have friends lining up to buy eggs when our hens start laying, so I imagine you'll have an easy time getting rid of any surplus eggs.
I got a variety pack of brown egg layers, along with a few EEs because I love their green eggs. I would recommend trying several different breeds so you can find your own favorites - some are better in hot/cold climates than others, so you might look in to that so you can have eggs all year round!
If possible, you might look for an organic feed that uses animal protein as its main source, as I've heard that a lot of soy protein may increase the risk of internal laying problems and isn't the healthiest thing for chickens OR humans - the one I get uses fish meal and dehydrated eggs as the protein sources and my chickens love it, they pick all the good bits out and avoid the Start & Grow crumbles I've been mixing in! Good thing they just finished the last of their bag, so they are on straight organic feed now at 12.5 weeks.
If you happen to be in Colorado, I buy my organic feed in bulk from a woman in Lyons. My local feed store put me in touch with her, but she puts ads up on Craigslist pretty frequently too.