Halo 3 on Xbox Live

[Xojins]

I'm trying to play on xbox live (just got it) and can't find a single fucking option that lets me join games. Anyone know how to do this?

 

[Xojins]

And another thing, whenever I post something it doesn't appear in the list so I have to go to all these things to find it again. Is it supposed to do this...?

 

[Geoffrey42]

*incredibly snarky response withheld in good taste*

 

[Mr. Bubbles]

... Really? I'm not even sure where to begin, to be honest.