When does the time start for the run. Does it start when you first move or when the world loads like can I go in third person and let the world load before I start my timer?

Yeah but at soon as you move a block the timer starts. You can see the rules if you want

the first frame of movement is when the time starts, going in f5 and looking around wont start time

Looking around is movement. Going in 3rd person isn't. Moving your vision is movement. Best tip is once you press create world is to run away from your device