Hi Zach, welcome to the wonderful world of blacksmithing!
It looks like your forge is working excellently, much better than the first forge I created! That first bar you heated above welding temperature, so hot it actually started burning! That's what all the sparks were.
Generally you want to work metal between orange & yellow hot, cherry red is a bit too cool to work easily, and white much to hot unless your trying your hand at welding.
I don't know exactly how your set up, but generally you want to be out of bright light as it makes it hard to judge the steel temperature. If you are set up outside, perhaps you can make a bit of a shelter over the forge?
Lee Valley has several books you can take a look at. This one (
http://www.leevalley.com/en/wood/page.a ... 6096,46130 ) is quite good, from the basics to more advanced techniques. If you are interested in japanese swordsmithing, take a look at John Smith's Youtube channel (
http://www.youtube.com/user/smithforge ), very informative.
For practice just about any sort of steel will work well. Round rebar (without the ridges) works well for practice, but won't be particularly good for projects as they are low carbon & will bend easily under any sort of use. Old files are an excellent source of high carbon steel, as are car & truck springs. Truck leaf springs are good bar stock, but if you find helical car springs you can practice on your forging temperatures by straightening them out.
Hope that helps,
Simon W