Where to start?

Filling my pool up right now and lacks about 2 feet from me being able to turn on my pump. I went ahead and added a gallon of bleach. My readings are.
Fc 5
PH 8.3
Ta 300

I know I need to add muriatic acid but was waiting to turn my pump on to add it. By pool math I need to add 1 quart 3 cups and 7 oz. Do I need to add all of that or should I add some (maybe a quart) then wait 30 mins. and do a water test again.
 
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