Writing for TV, you really need to live in LA or NY. I think there are some animated shows that write out of Atlanta. That doesn’t mean you have to move to LA though. You can shoot your web projects, short films, or feature films wherever the hell you want. And hey, who knows, if the right people see them, maybe they will come to you. But pretty much every TV writing staff is based in LA.
As for writing, once I got to college, I kind of always knew I wanted to do it. With regard to producing, usually when you shoot something that you write, you inevitably end up producing it as well. As for editing, I did it a little in college, and on a couple projects here and there… but I’m not very good at it. I’ve got friends that are a hell of a lot better at it, so I leave it to them… thankfully.