I am really good at acting but...?

im only 13, i have a lisp, and i guess im not exactly as skinny as other people are...but im really good at it!!! everybody wants me to do it! they say it might actually make me happy(for once in my life)...and i think im good too!...but i cant even say my s's right!!!and i live in the pittsburgh PA area...where would somebody even accept me!...or even hear me try out?