Trust normally comes from a relationship with them, as trusting someone is not something that can suddenly happen overnight. That may be why it can be so hard for us to put our trust fully in God.
Believing in something we haven’t seen or experienced can be difficult if not impossible, but if we let God show us how much he loves us, i.e. trust him, he will show us just how much he loves us.
Trust God and he will always be there for you, no matter how difficult life may be.