A promise from God changes nothing in a person's hands until the body moves on it that same day.
Conviction gets built out of what a person has already done, and God attaches the marching order to the grant for exactly that reason. The walking sets the state, the state decides whether a person feels hunted or sent, that emotion decides whether they engage the king or quietly go around him, and those engagements compound into a life that holds ground.
Waiting to feel ready is waiting for an emotion that only gets manufactured on the far bank. Never leave the site of a decision without one physical act that commits to it, because the insight decays and the action is what installs the belief the insight only described. Skip it and years pass in sincere agreement with a future nobody ever moved toward, and the delay gets called faith.