Well, you'll need a couple of things, and then you'll want a few other things to make things easier.Where would I what I need to fire this thing?
1. You'll need Black Powder. Folks will say that you need 2F or 3F for the barrel, and 4F to prime the pan. Others will say 3F for everything. Shoot what you have, or in these times, shoot what you can find.
2. A Powder Measure. You NEVER want to dump powder down the barrel from the horn or bottle, in case there's still a hot spark in the barrel. Pour powder into the measure, and then into the barrel. You can prime the pan from the horn, but you have to be careful to only get a little in the pan. A primer is handy, as it dumps about 3 grains into the pan.
3. A Ramrod or a Range Rod. Your wooden, under-barrel ramrod is good for loading, not as good for cleaning. A brass range rod with threads at both ends will be much more versatile. Search the forum for opinions and sources.
4. Lead balls and lubed patches. Balls are sized slightly smaller than the caliber, and the gap is filled by the patch. Search the forum for lube choices.
5. A Friend to help you find where to buy these things in the Austin area.
Maybe some other shooters or Texans can offer more tips.
You're fixing to learn a whole lot of stuff. It's not hard, but your Safety is in your hands.
If something doesn't seem right, stop until you get it figured out. Once that trigger is pulled, there's no turning back.
Good luck, and keep us posted with photos.
We love photos!