OK...
Now folkes... if you bug my next part I'll skin you alive and feed ya to the crows... or maybe I should say cows.. they are way far more insidious
First, be brave. I've roleplayed for years in MMos and in Gaming. Write your stories on the forums. Create a character you want to play... and AND never diverge from it's character.
Let me be honest. An amateur will role of the ol'english tongues.. he'll stereotype.. he'll do whatever... but if you think you can go real deep into characterization... do something fantastic.
I almost got kicked out of a RP group because I played a character that they thought was a mockery of the other gamers, but I did something they realized... 1. I was in character at all times. 2. my character was continually neurotic, inconsistent and wanting. He was gimped and he was insane... I played him as Chaotic Neutral, and psychopathic. 3. push the barriers of your alignment... if you are LG... then oppose even your CG RPers when they want to do something... not if it makes sense.. but if it really opposes the toon you are playing.
Remember stereotypes are for wannabe's.
Who says a paladin is always polite, disconnected and holy all the time? Why can't he be a recovering alcoholic, lecher that has been given a command by the gods to do what is right regardless of his love for pixie tail and dwarven ail? Why does a necromancer have to be evil? Why can't he be NG and feel that it is his duty to use his Death Magic to give greater peace to the undead?
In other words... think of something you've always wanted to be, to play and do it..
In my case I want to be Shrel's Donkey... only because he get's to sniff Cameron Diaz's ...