I'm looking to automate my home but know nothing about HA. What are some good resources to learn both the beginner stuff and more advanced topics.
There's no definitive resource on the topic or at least I could not find one (and I spent couple of months heavily involved in HA during one of my projects).
Get started with the Wikipedia article on HA. This gives you overview of what is what and gives you a good starting point. Then proceed to familiarise yourself with technology out there like X10, UPB, Z-Wave, etc etc.
From there you will be able to start to judge the prices of different technologies as well as find resources on specific tech/protocol/brand which seems to be a little more common than broad scope resources. In terms of sourcing the components, eBay as always is a good starting point. I ordered a few things from New Zealand because availability here is shocking. Though always be aware of country differences (voltages, frequencies, etc.)
I hope this helps you to get started. And I will definitely keep an eye on answers here - maybe I have missed something too.
This same type of question was asked last week. There were not many answers. I suggested looking at the Lutron.com site, as I have used this brand. This is an emerging technology and last week on TOH they featured a system (forgot the brand) in a custom high end home, very big bucks. If you check the tag for home-automation, you will see previous related questions and a few links. I would love to see some good links, looks like an internet research project. The Lutron system looks DIY friendly, but others I have seen require professional installation and programming.