You should look into the programming tracks and download the app on your phone. They'll have the schedule available there about as soon as it'll be on the website.
The programming tracks have panels all day; some, like gaming, run around the clock for the duration of the con. Your best bet is to narrow in on your particular interests and see what in that track you *have* to make. The other thing is that D*C is great for people watching -- lots of great costumes wandering around, especially in the evenings.
Maps will be on line and in the app, helping you figure out how to navigate the hamster habitrail (AKA skybridges) between the convention locations. If all else fails, either con staff or other con attendees are usually pretty friendly and helpful if you ask for directions.