Jesus didn't come to earth to save us from hell.
It is not your responsibility to save others from hell.
You don't know what hell is. You don't even understand heaven.
You're not better for thinking you have salvation. You're not better for your church attendance. You're not better than those you think are going to hell.
You are you. They are themselves. Jesus taught us how to love. Jesus taught us what to think. Jesus showed us what a purpose filled life looks like. Live with purpose.
Purpose does not mean you must move to a foreign country and spread the word. Purpose does not mean you have to memorize the bible. Purpose can be found with God. With love. Love God. Love those around you.
Take a deep breath. Accept that we are not perfect. Then understand that there is no way to serve with purpose unless you take Jesus seriously. He loved. He was happy. He was angry. He was fun. He is not a condition of your post-death location.
Love God. Love others.