Hi there,
I'm pretty new to the sport as well but am in DFW and can chime in. As many will undoubtedly suggest, run what you have. Grab some cheap mag pouches and perhaps a cheap belt setup, make sure you have enough magazines and ask for help from folks at matches. North Texas Multigun is a great place to start. Everyone has been super friendly and helpful to me so far. Also, if you aren't familiar with shotguns or don't have a semi-auto shotgun yet, try shooting 2-gun for a match or two to get used to how it works, it's a nice way to ease into the sport. Good luck with getting started, it's an absolute blast!!