Southern sweet tea is very simple to make. I make it a couple times a week.
Bring 1/2 gal. of water to a boil. Add 3 Lipton Family size tea bags. Cut off the heat to the water and let the tea steep for 30-45 minutes. Remove the tea bags and add sugar to your liking while the tea is still warm to dissolve the sugar(1 use 1 7/8 cups pure cane sugar). Pour the mix into a gallon jug, then add enough water to the mix to make 1 gallon of tea when finished. I would start at 1 1/2 cups and adjust from there until it tastes the way you like it, just make sure when you add sugar it dissolves as much as possible.
Easy peezy, lemon squeezy.