How do I stop feeling overwhelmed by the hands-on part of my job?

Knowing the checklist and doing the real work up-tower are two different things, and the gap between them can feel overwhelming. That is not a sign you do not belong. It is the ordinary distance between learning a job and living it, and everyone crosses it awkwardly. The checklist is a map. The territory is louder, colder, and more confusing, and that is where confidence is actually built. Take one task at a time. Do not try to hold the whole day in your head at once. The overwhelm shrinks when your focus narrows to the single thing in front of you. Next shift, pick one part of the work to do well and give the rest less room in your mind. Steady beats fast. The competence comes with the repetitions.