By not knowing what a steam community account is? I'm not so good at interface stuff, I'd even forgotten the whole, Shift+Tab at the main menu thing.

So... basically I didn't even know you could add friends in TF 2 until either yesterday or the day before.

While I may have built my own computer and have been gaming on PC's for like...15 years, I really need the beginner's guide for things like this.