Did you ever do acting?

Its alot more than that and the best part about this is you can learn and improve without you even knowing it, Think of the character you are portraying and think of him as a friend. Like any friend you want to get to know them so try looking in the characters view and also portray him as the bio he has. Meaning look at what he is like and become that, It is easy as long as you dont pressure yourself and if your lucky enough it is a natural talent that you have yourself just wait and let it free while your mind is free itself to become someone else :)