Survivalist 1: Catch 3 Bluegill Fish.
The prerequisite of this challenge is to complete “A Fisher Of Men” (Chapter 2), and the reward is “Survivalist Gun Belt Available At Any Trapper”. This guide will let you know how you can complete this challenge in Red Dead Redemption 2.
You can find Bluegills almost everywhere, but the creek south of Clemens Point is a good area for this kind of fish.
You can use Cheese as a lure and keep fishing until you catch three of them; it doesn’t matter if you keep it or throw it back into the water.