The goal of just act natural is to act as natural as possible while succeeding. This guide will focus on the race game (whilst in a call with the other players).
Strategy 1: literally just don't move and wait for the timer to run out
Strategy 2: hide behind buildings and other players like the little coward you are
Strategy 3 (most effective): loudly shout "if I sprint ahead will you let me win" and then begin to sprint in a straight line to the end regardless of the killer's response