Tracing an Image from Bitmap to Vector

[Tintguy]

Hey guys I appreciate any help or advice you have to offer... I am definitly going to be spending many hours on this forum.

I'm trying to practice so I know what i'm doing, I've attached a picture of cartman that i'm trying to trace so that I can cut it out into a sticker.

I've tried all the options (that I know of) as far as tracing the bitmap (line art detailed logo etc)... and they all give me an image that is... well.. crappy.

Is there something I can do to fix this problem ? or is there something different I can choose when I click to trace it?

Edit: i'm just looking to get cartman as a sticker... the trees and backround can go... I edited those out somewhere, I was busy so I guess I forgot to save it.