"If we will only surrender ourselves utterly to the Lord, and will trust Him perfectly, we shall find our souls "mounting up with wings as eagles" to the "heavenly places" in Christ Jesus, where earthly annoyances or sorrows have no power to disturb us." - Hannah Whitall Smith
I'm still serving God with a little bit fear, but yet God will "make you perfect, stablish, strengthen settle you" (1 Peter 5:10). Only by casting all your fears on Him, can God work in you, giving you the desire and the power to do what pleases Him. I realize God will use His ways to use us to work for Him, and it doesn't matter if we do something wrong; I mean, if we did not do very well in our own eyes or the eyes of other's. So we don't need to be afraid regardless of being an interpreter or teaching the lessons.
I think the basic essence of everything is trust. How do we trust Him as well as the woman of Canaan whose daughter was grievously vexed with demons? And just remember, God is love. There is no fear in love!