old wines not necessary good. young wines not necessary bad. problem with wines is, you know too little, you also don't know anything, but too difficult to know too many things.

easiest way, buy a bottle a month/a week whenever you can afford it, and drink it. if you like it, remember the brand and year and grape. keep in memory what type of grapes you like (shiraz, merlot, cabernet sauvigon, etc for reds or sauvignon blanc, riesling, etc for whites). know more doesn't mean you enjoy more. just try and you'll eventually learn as you drink along. after all, wines are supposed to be enjoyed!