I have no handy links or handy books that help for this. What I offer is nothing more than an comfy - and EMPTY - chair.
When dealing with new players, to get them in the "mood" for role playing, I ask them to think of gaming like a movie that they are WATCHING - that they are NOT starring in. They are the DIRECTOR for the character on the screen. What is THAT PERSON going to do? The DM is crafting the set and other characters, but the player is directing this particular character.
I will warn them that the DM will ask, "What are you going to do," and, "What do you do," but they should hear "What is your character going to do," and, "What is your character doing," instead.
This has always helped for me.
As for what you should do for a class, outside of this little tidbit, I can offer nothing.