What exactly does roleplay involve in the game? ive never tried it
It simply involves playing the game as if you are the character, so with your characters persona whether thats a jovial joking kind of person , or a miserable git, or someone whoever hates dwarfs or elves or has a fear of spiders or whatever. Basically whatever your imagination comes up with (though I understand use of imagination is an increasingly rare commodity in this world of spoon feeding )
There are many different levels of Rp from light (who generally allow lots of ooc and metagaming) to hardcore Rp (who rarely go ooc and sometimes impose their own restrictions on their characters ( like one of my characters in UO who distrusted magic and never used anything magical in 4 years of play)
As I say though you don't have to Rp on the Rp server , just be sensible and tolerant of those who might be.