Not a silly question at all. Just follow the signs for the Epcot resort area, and you should then see specific roadsigns for the Boardwalk from there - it's actually pretty close to the MGM Studios, too.
As far as parking goes, if things are not busy then the security guard may allow you to park in the main hotel car park. From here, it's a 5 minute walk onto the Boardwalk. If they are particularly busy, you'll most likely be directed to the overflow lot across the street - this is a little further away - perhaps 10 mins, but still not very far.
Finally, you could use the valet parking which is $6 per day (plus tip), and simply drop the car off at the hotel entrance.
Definitely worth a visit just to take in the sights and stroll around the lake.
Paul