No, you can't walk it. It's at least a few miles from AK to Coronado Springs, and you'd be walking along a busy highway with no sidewalks. There is bus service between AK and CS, though, as long as AK is open. So, if your dinner finishes after AK closes, you'll need to take a bus to a theme park that's still open, or DTD, and then switch to a bus to your resort.
If you're a first-timer, one of your biggest surprises will be the distances at WDW. Remember, the place is the size of a major city, and the maps are kind of deceptive in that things that are miles apart look like they're right next door.