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Google homeschooling resources, and begin talking to the homeschooling groups in your local area. Homeschooling has a network of families that support each other generally. It's the easiest and best way to get started. Plus, you'll get a lot of guidance on what resources are good and which are a waste of time.
Having been homeschooled, this is a great suggestion. It's pretty easy to get too isolated, and homeschooling groups help a lot. Also check with your local schools - I was able to take 2 classes while still being classified as 'homeschooled', for free (since it's part of taxes already), which can give access to tools that are otherwise way too expensive.
I wish I could have gone your route; it seems like you got the best of both worlds! Oh well, I know what to look into for my own kids : )