God deals with all of His children. He chose, prepares and sent them away. We are all missionaries disguising as teachers, caregivers, workers, friends, ... bloggers,... etc. We all have our own task according to the gift God gave us. Whenever the Lord assigns us a difficult task, he gives us what we need to carry it out.
I remember one time that I was in a situation that the Holy Spirit prompt me to do something that would bring out tremendous changes in my life and to the life of my friend. It was something like tearing a piece of shirt in two... stepping into the uncertain water from the solid ground I was in... but God has been all the way to both of us in a way that He wants us to do.
If God has given you some special task to do that frightens you, it's your responsibility to carry it out. It's up to the Lord to see you through. He will just pour out the blessing as you go on and dow what He wants you to do. As you faithfully do your part, He will do His part.
"Arise, go... I will not leave you nor forsake you." Joshua 1:2,5