Pick a character and be that character xD
your talk depends on the POV you're in.

Or on facebook~ You can make a new facebook with your favourite idol/character and search for who wants to roleplay ^_^ OR asianfanfic has a site just for roleplaying: http://www.roleplayrepublic.com/

pick a character and find someone to roleplay with and talk.
if u want 1st pov, u talk in your pov.
example: So, you've been here for a while i heard? *watches you closely while smiling*
if u want 3rd pov, u talk in a 3rd person's pov.
example: Sehun watches the fidgeting, slightly taller younger man while smiling asking, "So, you've been here for a while i heard?"
of course it can be longer. it depends on people's talents of writing or conveying it.

uh idk well i've done it its just been a while

yup WE need help...