As for where the RP would happen, in a thread or PM is fine. Whichever is more comfortable to you. I tend to answer PMs a little better, as I see the notification on the top of the screen, but I am trying to be better about watching threads and seeing replies in a timely fashion.
Oh, and before I forget, I don't mind your literacy level, so long as you don't butcher words intentionally and murder grammar. Mine isn't perfect, and I don't expect everyone else's to be either, but trying is cool. ^_^
EDIT
I do like to do a few RPs at once, as I am fairly good at balancing them. So this thread will have (Open) when I'm ready to get new RPs and partners, but the thread will have (Closed) when I'm not. I know, not hard to figure out, but it probably didn't hurt to just make sure it was clear.
