When you help one person, you help them all. People often have no idea what positive impacts they're having. You're definitely a good person for even wanting to do that.
I too got called "highly sensitive" growing up. It took me a while to realize what that actually meant was "having a soul."
Want to help kids? Tell them it's okay to have feelings. Tell them it's okay to be sad, confused, upset, angry, hopeless, afraid, whatever. If I heard that even once growing up it would have made a world of difference.