if you're really interested, as well your job seems to depend on it, buy some books on wine. Since you seem to be starting from near 0, try Wine for Dummies, its a great book for starting out, particularly definitions (things like tannins, etc.) discussions of cork/screwcap, myth debunking etc. It also has many great reading references for more indepth and esoteric aspects of wine, wine making, wine history, etc. when you're ready to go beyond the basics.