The Apostle Paul has to be of the bravest man in all Scripture. He encountered physical torture for the gospel, false imprisonment, and even attacks for wild animals! (See Acts 28:3 and 1 Corinthians 15:32).
Paul boldly shared the gospel with working class people and the educated elite. He debated philosophers in Athens. He also shared the gospel with governors and people in high authority.
In all this Paul asked for prayer to share the gospel fearlessly.
Pray also for me, that whenever I speak, words may be given me so that I will fearlessly make known the mystery of the gospel, for which I am an ambassador in chains. Pray that I may declare it fearlessly, as I should. (NIV Ephesians 6:19-20)
If the Apostle Paul needed prayer for courage, then so do we. Do not be surprised when you feel scared to talk about Jesus with our friends. Ask God for mercy on times you have given in to the fear. And then pray for future courage and fearlessness in standing up for Jesus. Ask and you will receive!