Yes you can. If the pH is high, that is good because the cycle goes faster at high pH. You have the cycling period to work out why the pH is so high. Test your tap water's pH, both a freshly run sample and a glass of water that's stood overnight. Use both the pH and the high pH testers just in case one or other is below 7.4. It is not unknown for freshly run water to have a different pH from water that has stood overnight, so you need to know both tap water pH levels (fresh and stood)
57.6 mg/l calcium converts to 8 dH and 144 ppm. Fish profiles will give the hardness range needed for a fish species in one of those units. When you research fish, look for those species where your hardness falls in their hardness range.