Anxiety doesn't necessarily cause concentration problems as its own symptom. In fact, it could be argued that anxiety actually improves concentration. Anxiety is the activation of your fight or flight system, which is meant to keep you safe from harm by ensuring you're running away or fighting without distraction.
The first set up is a standard 20-25 pound test rig (depending on the size of the tuna) with a size 1 to 2/0 hook depending on bait size and the size of the tuna. Fluorocarbon leader can be super effective if the fish are touchy (biting infrequently). This set up will be the primary bait fishing set up.
These rigs are great for pier fishing due to the length of the heavier rig, which allows you to use many different kinds of pre-tied hooks. For Croaker and Spot you will want to use size 4 or 6 pre tied hooks and for bluefish you need pre tied wire leader hooks in 2/0 to 4/0 depending on the size of cut bait you will be tossing out.