When you get to WDW, they will give you a transportation guide - which inculdes how to get from point 'a' to point 'b' and a map of WDW.
It's fairly simple to get around WDW, it just might take a long time to do it.
When traveling from Resort to Resort - instead of going to Downtown like they will suggest, go to the nearest theme park and get onto the destination resort bus/etc there. Sometimes there are boats or monorails that will get you to the destination resort from a theme park.
If you'd like even more info - how I would suggest getting around to specific places- send me a P.M.
-Kim