It is simple, but one mistake can be lethal. I worked in Columbus, Georgia to four years, and it turned out the cliche of southerners all making moonshine has some truth to it. The Linux guy in my group was from Alabama, and he was describing how he used stainless steel pipes instead of copper, used Tums to get the pH right, and regulated temperature with an aquarium water heater with thermostat. He was very proud of his product, but warned me not to mention his college pastime to make money to his kids.
It’s one of those federal laws that some states basically ignore. People make shine here and sell it to friends. Everyone knows it. Peach moonshine seems to be a favorite.
My wife's sister lives in Tennessee. When visiting California some ten years ago, her husband brought a jar of moonshine whiskey and gave it to me. Thanked him, but never drank it. I like keeping my eyesight. Still have the jar of moonshine as a curiosity keepsake.
Just don't cut it with non-edible substances.