In Matthew 28:19 it’s says” Jesus said
Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost. Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.
Fear is what stops people from witnessing. Don’t let fear keep you from witnessing.