Butler, no offense, but that "breechclout" congered up a mental image I could do with out! :-D Course, in February, it might be worth it just ta see someone turn blue!
In all seriousness, what the fellows above have said is good advice. Cas folks love to share. Now, when ya get hooked and decide to go for it, here are some things you are gonna need and do. You need a cart. A gun cart is fairly simple to build. Look at the ones at the shoots and get a few ideas. It doesn't need to be elaborate, just able to hole a couple of long guns safely and securely plus have a place to store ammo. There are plans available on the net. Decide what caliber you want and buy a rifle and pistols in that caliber. Having all in the same caliber is great. Having the rifle in a differant caliber than your pistols will work fine as long as it is sufficiantly differant to prevent confusion. In other words, a pistol in .44 and a rifle in .45 will cause a problem eventually. Get a shotgun. A double or a pump with an exposed hammer such as a Winchester 97 are about the only choices. No modern pumps or over and unders allowed. Start on a costume. Regular cowboy boots, jeans, a long sleave button front cotten work shirt or a flannel work shirt will work fine, plus a cowboy hat. Eventually you might decide to get more elaborate, but there is plenty of time for that. If you don't reload, consider it. It is cheaper whenn using the larger calibers. And, of course, leather. A lot of folks go in for the fancy, expensive stuff and it is great. But to start out, a set of Hunter leater, two holsters and a belt, can be had from Cabela's for under a $100. You will also need some sort of shot shell slide, either for your gun belt or maybe a separate shot shell belt altogether.
I know this is a long list, but maybe it will help. You don't have to have it all at once. Hope it helps and doesn't confuse ya!