Yup, cycle always first
As mentioned, chose a salt mix that reflects what you intend to keep, those numbers are fine, but Alk say 8.5-9.5 ish, this level must be stable at all times
Once cycle is complete, a regular water change should restore all ions back to what's required if no or few corals.
As Stoney corals increase, watch for a fall in ALK and CA and learn the amount of both, you need to keep stable. Sometimes this turns into a doser.
Stability is key, in all 8 major parameters, when this occurs and stays for several months, any coral you put in will thrive.
Unstable is slow death for softies, fast for SPS
Good luck have fun!