www.bible.com/111/isa.12.2.niv
How do you not be afraid? Put your trust in God. By putting your trust in God your fears will go away. This doesn’t mean that you won’t ever be afraid again, but it does mean that you will have the ability to conquer your fears. God has promised to always be there with you no matter the circumstances, therefore you have nothing to fear. Remember this “For God gave us a spirit not of fear but of power and love and self-control” (2 Timothy 1:7 ESV). With God are your side you have nothing to fear so go out and boldly do whatever he has called you to do.