To view your booth as buyers will see it, point your mouse over the "Selling" link in the upper left-hand corner of any page and select "View your booth" from the drop-down.
There's also a button at the top of the "Selling > Add or edit items" page to "View your booth." That's the easiest way to see your booth right after it has been setup.
Note that even though you can see your booth by clicking on "View Your Booth," no one else will be able to see it until you open it.