No! No, it means- it means you won't turn into that. Just think of it like alternate timelines. The other Sam lived back at home right up until the big prize fight and he went through- Jesus, you don't even know. He guzzled gallons of demon blood, and that's when the Core brought him.

But your timeline has split off from his. You don't have to be him at all. As long as you're here, you never will be- and since the other Sam only did those awful things after a year of living here, there's no way you could ever turn into him. Never.