Lemme see...
Grammar - Check.
Proper mental function - Check.
Rightfully fears The Soviet - Check.
I suggest you contact the various thread GMs to find a way to get in on one of the threads. As far as what to write, well, just flow with the story. It depends on your style. While a post from, say, Essex, may have a lot of heart and more than a little drama, a post from say, me, will have people getting shot at and et-cetera.
And a post from Devious will have enough evil thinking in it to make you really wonder if he could kill you with the press of a button. But I digress.
So yeah. Contact thread leaders, don't godmode, and for the love of pete, have fun!
Awww, I feel loved. 
And Seferin, it looks like you're much like I started out. Before my first post in the Final Fight thread, I'd literally never done anything like this before.
But I'm always up for trying new things, so I just started telling a story. Okay, so I didn't exactly start, I more of just droped the bomb in the middle of tone, but those are technicalities. Point being: just write what happens to pop into your head. Start telling a story, and when you encounter other people, mesh your story into theirs and let it grow. You'll be surprised what kind of cool tales can come when a couple of people start putting their stories together. 
"If I had Force powers, vacuum or not my cape/clothes/hair would always be blowing in the Dramatic Wind." - Tenzhi
Characters
I've been monitoring the Roleplaying section of the CoH boards for quite some time now. I've never actually done any roleplaying on paper before, although I do have some minor experience in game. I just have one thing to say to all this:
I'm scared to post here.
Well, what I mean it, really, I have no idea what to do. I read a lot of the threads with the tag [Open RP], but never do I once hop in to join in with the fun. And that's because I really don't know if I should or shouldn't, what to write or junk.
So, what should I do? =P