I recommend picking up a resource manual for your education. Wine For Dummies is a great read, and I still use it as a reference periodically. Another strong book on the subject is Windows on the World Complete Wine Course, by Kevin Zraly.
Reading Wine Descriptions
Wine labels are not uniform—some list specific varieties, for instance, while others may just name a region along with the winery name. One rule of thumb: the more detailed info on the label regarding the place of production, the better the wine. If you see a label from a winery in Oregon that describes the AVA (American Viticultural Area: designated to have unique and quality wines) and gives the name of a vineyard, you can bet the producer thinks highly of the wine.