Yes as soon as the pool is empty start the refill
So the drain and refill will have removed the majority of the copper
Hopefully this will leave any remaining copper in pipes and your cover area diluted enough not to cause you problems
The remaining level will slowly lower over time as you backwash and fill
The plan once the pool is filled is to do several long backwash and rinse cycles to clean your filter
Then we will balance your water in this order. This means addressing
ph - to 7.2
cya - to 30ppm
ta - depends on fill level
calcium - to 200
Then we will elevate the FC to 10 with bleach and keep it there ready for an OCLT
If you then pass we will then tweak your water chemistry
We will add the chemicals one by one, at least half an hour apart with the filter running
Dont add anything without checking first on here
This should get you off to a great start
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I think you may have lost prime on your pump from low water level / sucking air
If you want you could add water to raise the level a bit and retry the pump
Or else just start the fill