I'm a new gardener and a new chicken owner and it's been a lot to learn. There are tons of books on both subjects - type "vegetable gardening" into Amazon and you get 3,905 books. "Raising chickens" is a bit better with only 116 books. Look up either on Google and you're getting into the millions of hits. Basically, there is a LOT of information out there and it's hard to know where to start and what to trust. That's why I was so happy when I "discovered" the county cooperative extension system. It turns out that every state, even DC, has a cooperative extension agency - its part of the USDA and it's whole purpose is to "help people use research-based knowledge to improve their lives." Check out the wikipedia page for a full list of links.
I'm a suburban girl so I didn't have any previous experience with the county extension at all (besides that they're the ones that run 4-H - start 'em young!) so I know I'm a little behind, but our county extension has turned out to be a good resource for deciding what veggies and fruits to grow and, even better, how to raise chickens. A couple of weeks ago, my husband and I went to a free class hosted by the county extension entirely on how to raise and manage chickens. They had 6 different presenters, mostly veterinarians from the University of Maryland and all chicken experts, who talked to us and answered questions for 5 hours straight. It was such a good use of our time, both because of the information they provided but also because I now know who I can call if I have questions about my chickens. And that's the thing, it's their job to help people be better gardeners and farmers. Woo hoo!
The Maryland extension service has a list of fruit and vegetable cultivars that have been researched to be the best for my area. Hopefully, after a couple of years of this, I'll have my own opinions on what cultivars to grow but this is a great way to get started.
I was very surprised to learn too that the extension service does non-farm/garden things too - like how to run a household budget and how to shop for and make healthy meals for your family. Check out this little calculator on the Iowa Extension site for how much you should be spending on food to make healthy meals for your family.
All this to say that if you're starting out with anything, including things like straightforward household budgeting, your county extension agency might just be a good place to look. Who knew?