The process is the same for converting doge to USD (which I should make clear in the guide, thanks).
There are a few exchanges with plans to offer direct exchange from Doge to USD in the coming weeks, which I will also be making a guide for when it's released.
You could alternatively sell your Doge for USD through a service like eBay and add a nice markup for convenience (doge is selling for 2x the value in some bids), although you chance dealing with scammers.
edit* thanks for the props, specifically in comic sans :)