I used to be like you when I was 12/13. I thought I was really funny, but now I want to go back in time and give myself a good talking to. It's impossible to be constantly "wacky" like the people on TV, which I know is what you're going for.
Just take some time out, find yourself, and be that person. You may think you're content and awesome right now, but in the future, you'll regret it. Trust me. Just like I did. Don't be "random". Ugh... It's weird, because it's like I really am talking to my past self here. And I don't even know what to say.
Just... be cool.