To a point but your tank will still cycle anyway. But with new, young fish in a new tank all bets are off on what the fish will tolerate.
Better off imo looking after fish first, tank second. My thoughts anyways.
The main risk is that if your fish get too stressed and catch a bacterial infection, all of a sudden you have an infected tank which is still cycling. Any meds use may dent the nitrifying bacteria still trying to establish while the infection is also in the water column so buying new fish is an interesting adventure.