Doug, the asshole beat-boxing eggplant, will tell you where to go. He just needs a map, or similar.
You know. A paper thing that shows the places you can go.
Did you try to click on the items on the screen? Did you check your mail?
Use the mailbox.
You know about those russian dolls with smaller dolls inside them?
Click the smaller mailbox again in your inventory.
Well, guess what you have to do...
Click it again!
You get a postcard that will act as a map.
Give the postcard to Doug.