Installing OEM Aux Input - 2008 Sedan

[nieltown]

This is totally out of nowhere, but I have one of these:

http://i.imgur.com/MKgs0cs.jpg

and that's it. I've also never done any stereo work of any kind before. Is this something that would be too ambitious to try as a beginner? What parts would I need, and where should I look for information on how to install it?

If I were to take it in somewhere, what would you recommend I do/ask and how much should I expect to pay?


Help me, please! I hate not having an aux input in my car, and I don't want to replace the head unit because I want to keep it all stock for whatever reason.