Without knowing where you're coming from or exactly where at WDW you're trying to go, it's a bit difficult to provide driving directions.
My personal strategy is to use a free service like mapquest.com or googlemaps.com. On these sites you put in the address of your starting destination (home) and your ending destination (your Disney resort). I don't know where you're staying, but you can find the street address by calling Disney at 407-W-DISNEY or on the hotel-specific pages on the WDW website. For example, if you look at the Port Orleans Riverside page on the Disney website (found
HERE), you'll see the resort address listed on the right hand side.
Once you're at WDW, the hotel can give you maps of the entire Disney World property and explain how to get to all the parks and resorts. And if you're not in the mood to drive while you're at WDW, you can just use the free Disney transportation to get you from place to place.
Enjoy your trip to Walt Disney World.