To learn about wine is a varied task. For some it can mean a professional certification or complete training. For others it can be as simple as learning a framework of terms so your descriptions at least for yourself can be consistent across time.

The best thing I have seen come into the world of wine is the Systematic Approach to Tasting offered by WSET. It is the benchmark worldwide and used by all Masters of Wine and to a large extent by Master Sommeliers. Watching something like the movie Somm gives you a chance to see someone run through a structured SAT tasting. It allows wine fans around the globe to describe wines with a set if terms that allow comparison. It also sets up a standard of "balance" against which quality can be judged. Taking a level 3 course done by a WSET licensed teacher is very basic and very easy and very very worthwhile for understanding wine. If it is more than you wish to do then a good tasting group of friends will help get a shy drinker up to a point of confidence fairly quickly. For me, being able to describe wines at a particular meal is not as useful as being able to compare thoughts on wines from dinners spread over a decade or several. The more structured approach allows for that.