It is easy to object to what God calls us to. Often we feel to small.
And maybe we are right humanly speaking. We may be too small on the basis of our own power.
But if God calls us to a task then God is with us. And all things are possible with God.
We are never to small to complete a task with God's help, because God is an unlimited source of help. If God is for us we will succeed.
The great importance of prayer is often seeking out God's will for ourselves. When God is behind what we are doing we are on firm ground indeed.