reconstituting juice concentrate

Hi,

I have some juice concentrate but no instructions.

How should I reconstitute it?

My idea is to sanitize my fermentation vessle, put the concentrate in, then boil some water in a covered pot and let it cool covered, then add the water to the fermentation vessle.

But, I am wondering, if boiling will drive out dissolved oxygen, will that create a problem for the yeast during the primary fermentation? Can I add oxygen without oxidizing the juice?

Should I add bisulfite like with fresh juice?

Thanks