Never buy pre-ground coffee, get yourself a grinder, and some whole beans. If you don't have filtered water, let the tap run cold for a good minute or two before you use the water, it flushes out some of the mustiness from the water sitting in the pipes.
Start out with blends. Preferably less roasted varieties, the darker the roast the stronger the coffee. Something in a Kona blend is a good start. I prefer single origin coffees myself. But they can be somewhat expensive, depending on where they are from.
See if you can't find an independent roaster in your area, they usually have the best, and freshest, coffee beans. Plus they like to help newbies out.
Don't be afraid to add milk or creamer, just learn to not overpower the coffee flavor. Same with sugar.
I like black coffee fine, but sometimes I want something to gradually wake me up, not slap me with a 10 pound sledge immediately.
Look this over. Coffee Information and Tips