On this link you'll find lots of information on almost every aspect of keeping birds - from coop building ideas, to incubating eggs - https://www.backyardchickens.com/articles/
There’s a link on the page above to the Learning Centre - it’s a great resource. If you have a specific topic in mind, just type it in the search box - there's a wealth of information on past and present threads.
This is a useful link of BYC guides to take a look at announcements-feedback-issues-guides.3 (there's a guide on how to include your location under your avatar - including your location is very helpful). You can use this link to contact members in your area - Find your State's thread - peeps there will be able to advise on predator-proofing your coop and preparing it for winter.