I second the library and internet suggestions. You may want to read all you can, because you will find that everyone has a different way of doing things and running their "school".
I would recommend that you do a search for homeschool groups (yahoo has a ton of them) for a group in your area. It's nearly essential that you join a homeschool group to get the support of other homeschoolers in your area, to get together for park days, to collaborate ideas, etc. I don't know what area you are in, but there are a ton of homeschool support groups in the DFW metroplex.
You can look up Texas homeschooling "laws" at http://www.hslda.org The laws in Texas are very homeschool friendly, which really does make it easier for us homeschoolers.
If you want a list of sites that have free lesson plans, curriculum, etc, feel free to email me - ____@____.com (w/o the spaces of course) , it's a long list so I don't want to post it here :)
As you start to read and research you'll find that there are a lot of curriculum options, and you'll find it they can be quite expensive, but they aren't "absolutely neccessary" , homeschooling can be done for "free" using your library and the internet!
Anyhow, good luck on your journey!
-S.