First, do not worry about making a fool of yourself. Such worrying means you will not have fun.
You do not need fancy gun or gear, just need enough mags, since some stages are 30+ rounds. Carry enough ammo to run the stage, plus one magazine, in case something goes wrong.
Last, shooting matches regularly means you WILL get a reloading setup. I recommend Dillon, because they make volume reloading easy.