So, instead of spouting random stuff like I normaly do, I'll link everyone to some useful tutorial videos. The stuff he talks about in the videos has already been covered, but sometimes it's nice to see it instead of reading it.

Part 1
Part 2
Part 3
Part 4

The only thing you should disregard in these videos, is how to netplay, as we will be using Tunngle to connect to each other.