I mean, I see a friend playing, how in the world do I actually form a party?
You have to send your friends an invite to play. Hit the big silver X button (does that have a name?) go to Friends and then send the invite. It's unintuitive and kind of a pain that you've got to leave the Halo interface to do it but not that big of a deal.
I'm not that great either because I haven't been playing shooting games with a controller since probably Goldeneye back in the day.
You can add me to play Social Slayer, Team Slayer or if you want to do some multiplayer Legendary campaign.
gamertag is thegardentool
Why would you want to wast time hitting the big X button when all you have to do is press Y in any menu within Halo to bring up your friends list. Quick, simple and effective.