Depending on your cycling method your tank can be cycled quite quickly, or very slowly. We don't have a clue what your cycling method was. We don't have a clue where your parameters are. We don't know the size of the tank, or fish.
If you have 0ppm on both ammonia and nitrite, and your nitrate is rising, then you are very much on track. IF this is where you're at then i'd do a water change and add those fish slowly, perhaps over the space of a few days, just to be sure. Like I said we don't know what size they are or the bio load they are likely to put out. If you lump them all in at once you may get a spike.
Then it's just a case of monitoring your parameters and fish.