What could i do to help out burn victims and people (especially children) that have been through such horror?

Reflecting on my life at this point ( i am 21) has made me really consider how little that I have done and how much self-pity that i drowned myself in when there are people out there who need a lot more support and healing than me and my trivial issues. I want to help people out who haven't been dealt the greatest cards in life and in particular children but really anyone. I am thinking that i want to help out burn victims or people who have been through physically debilitating situations.