Excuse me, can you help me figure out how to get to the Wudaokou subway station from here?
Sure. . . first you're going to have to buy a ticket to ride on the subway. The Wudaokou station is on the lightrail, so you'll have to transfer. Be sure you buy a combination ticket for the regular subway and the lightrail. It should cost you 5 yuan.
An after I buy the ticket, where should I go?
You can take the red line train from here, but you'll have to transfer to the blue line at Fuxingmen transfer station. After you transfer, take the blue line that is heading north towards Fuchengmen.
So I transfer from red to blue, then how long do I ride the blue?
You'll take the blue line until you reach Xizhimen. That's a big station, so there will likely be a lot of people getting off at that stop. You can transfer to the lightrail there, you'll have to exit the subway and present the unused portion of your combination ticket to the Ticketmaster, they'll give you a new ticket to use on the lightrail system.
It sounds so complicated!
No, not the really, don't worry about it, like I said there'll be a lot of people there doing the same thing that you are doing, so just follow the crowd, There's only one direction to go, so you won't get on the wrong train. Head north on the Yellow line, and you'll see Wudaokou in just a couple of stops.