areivim,
if your skill is in writing as opposed to speaking, find a way to use that writing skill! Ask one of the organizations if they need someone to answer emails from teens who need someone to talk to.
moish,
I echo the words of everyone else here that you’re being way too hard on yourself. The fact that you aren’t the gadol hador yet doesn’t make you a complete failure. There is nothing wrong with taking pride in the tiny insignificant things you do l’shem shomayim. They may not be that tiny and insignificant in the eyes of Hashem as they are in your eyes.