Lots of good info already but I'd recommend not buying anything else. Reach out to the match director of your local club and let them know you are interested. Some clubs have clinics or practice days to orient new shooters. If not, I'd recommend attending a match or two to observe and ask questions. If you decide this is the game for you, come with whatever gear you already have (remember, no buying yet). Bring a few boxes of lead bullet ammo and a box or two of 12 gauge birdshot shells.
I had observed part of a match and decided I wanted to join in. The match director said "don't buy anything" so I showed up for my first match with ammo. No coboy guns, no leather, no cowboy clothes. The "don't buy anything" advice saved me money. I thought I knew which rifle to buy but I tried that brand of rifle at the match and didn't like it. I was able to make an informed choice because I was able to try several different rifles, revolvers and shotguns at my first match.
Just about every knew shooter assumes that they need to buy revolvers and a rifle in .45 Colt. Some of those folks end up selling and buying .38s down the road because the ammo is cheaper (and we shoot a lot of ammo) and the .38s are easier to shoot fast. If you end up choosing the .45, great, but again make that choice as an informed choice.
Oh, and welcome aboard!