Sort of piggy-backing off previous answer.
Find a style of beer you like and go from there. I began brewing/REALLY drinking beer about one year ago. There are many styles available in your area including lagers/kolsch, pilsners, wheat beers, IPAs, ESBs, stouts, porters, farmhouse/saison ale, pale ales, lambics (fruit beer), bocks, dunkels and marzens. You also then begin to have imperial versions of these which have a much higher alcohol content as well as aging in barrels, dry hopping, adding spices and "smoked" beers achieved from specialty grain that's been smoke treated. Then styles begin to differ according to yeast strains used during fermentation, amount of hops added and also just different ingredients used during fermentation. Flavors are also achieved by adding ingredients to the "wort" (pre-beer) made after mashing the milled grains to obtain their sugars and then boiled.
What I think is best is to go to ther store and try to find as many different varieites as you can and take notes on them. Write down what you liked, didn't like, distinct flavors, mouthfeel (carbonation and consistency). You'll begin to know what to expect from brewers and their styles. Either way, you can only have fun by learning and teaching your friends. Soon you'll be a beer geek!