Fishing is mostly waiting with your line in the right place. Being ready and being calm can happen at the same time.

Readiness and agitation are not the same state, though they feel linked. You can be completely prepared, in the right spot, with everything set, and also relaxed, because the preparation is what buys the calm. Most of what people call patience is that: the work is done, so there is nothing left to be anxious with.

Aim your effort at position rather than at waiting harder. Pick the right spot, bring the right gear, do the prep the night before. Then let the waiting be genuinely restful instead of a vigil.