It is God’s will for you to totally trust him and to be completely at peace in every situation.
You have to learn this.
It took Paul some time to learn this (compare 2 Corinthians 1 / Philippians 4)
It will take you time to learn it.
Just decide that you will learn it.
Philippians 4:4-7 - I am able to do all things through the one who strengthens me