I know this is a few months late but I was just looking online for mission stuff and came across this.
I'm graduating soon as well and have been praying so much about full time missions. I spent this past summer as a missionary for Life Teen in Tiger, GA, which was life changing. They also have a year long mission program in Tiger, Atlanta, and Germany, so you should definitely check those out if you love to work with youth. But I'm kind of on the same page as you, my heart is with those who don't have much at all.
I know I will probably end up as a missionary in some third world place some day but I think for my first year after college God just wants to form my heart. And as much as I want to be in the gutters like mother Teresa, I need to learn first what it really means to be a missionary and a humble daughter of God.
Life Teen is amazing in what they do because they offer an entire year of missionary formation. You are basically secluded in the North Georgia Mountains for a year at Camp Covecrest a Life Teen summer camp. You spend the year diving into scripture, church teaching and God's will for your life. I've realized just how important it is to do this because only then can we really begin to understand what our call is. It is kind of like a year of guided discernment while you also help out at the camp with youth, community outreach, various retreats and summer camps and also a mission trip to Mexico or maybe even Haiti.
Anyway, know I will be praying for your discernment and God's will for your life. Just remember to give everything to God and He will definitely lead you to where He needs you.