Buy a bottle of the cheapest red you can find, and a bottle of black cherry soda. Mix. Drink. Get fuuuuucked up. That's how I like my wine.
In all seriousness though, unless you've carefully developed your palate through tastings, it's going to be real difficult to tell the difference between a backyard Cab and a Pinot from some appellation controlee in the depths of France where they consider their terroir a national treasure.
Find a liquor/wine store nearby that is known for their discerning tastes, walk in, and ask the owner or clerk for a bottle of their favorite Pinot Noir, Merlot, Sauvignon Blanc and Riesling (2 good reds, 2 fun whites). Grab a good hunk of cheese, a nice baguette, and some assorted fruit. Go home and try them all, preferably with some friends. And remember: don't become a wine snob.