Hi! Depends on what kind of help you'd like to do.
If you would like to help people in the Mother Theresa way then u can be a Nun / the male ver (If you are a catholic) or the similar one If you are a buddhist in religion.
If you are christian u can do missionary.
But If you are not of a religion u can also do non-religious missionary works. I'm sure it'll suit someone as kind hearted as you! Salute! :)