Wolfton

First of all, if you have ever been in a Drama class in school, think back to that; it might help . All you have to do is pretend to be someone that you are not.
Don't worry about what other people think about your character, it is not you.
The first thing I would suggest in creating a RPing character is pick an origin that would tell how you got your powers. Then using that origin, create a story about how you got your powers and a little background of your character's personality. Lastly, speek how your character would speek based upon your background.
Another way to do it is to just start typing differently and build your story around that; just make sure that how you are talking match how you look, gets a little less confusing that way . That is how I made my RPing character. I made a character then one day just started talking in third person and decided that my character was a barbarian since he looked kind of like one.
The last thing I have to add is, have fun .

I have one character that I roleplay with; wish there were more, but I do not know how to make each of them talk. My roleplaying character's name is Beastly Brute. He is my tanker and I am always speaking in third person when I play him

Beastly not too smart, but Beastly love to smash and bash! Beastly also like helping, that why Beastly hero.