Drinks writer Matthew Latkiewicz schools you in the A-Z's of alcohol. He actually wrote the book on drinking—the highly readable, entertaining, and dare we say educational "You Suck At Drinking," which you should definitely pick up from Amazon or wherever physical and digital books are sold.
The basics of the Julep are as simple as cocktail making gets and comes in many forms... in actuality, the Julep pre-dates the modern cocktail and was known for sharing in the 1850's thanks to Mr. John Dabney.
Beer used to be served warm and barely carbonated (the horror). That is, until John Wafting invented the beer pump in 1688 which kickstarted a wave of new inventions that has resulted in the glorious keg brewers know and love.