Change your mindset about what 'doing God's will' mean. Stop comparing yourselves to others and think that you need to be preacher or be a missionary in order to fulfill God's will because that may not be true. God can use anyone and he can use them in surprising ways.
Have you ever considered that maybe exactly who you are and where you are is God's will for you?
I have learnt recently that God does not need to send me out right now for there are still people around me, my family, my friends, the people I work and study with who needs me where I am...
“I am giving you a new commandment: Love each other. Just as I have loved you, you should love each other. Your love to one another will prove to the world that you are my diciples”. I don't know what you can or can't do but for sure you can love. So start with love and start showing your light in your everyday life... I pray so that God will use you in that way...
God Bless.