Well, I recommend you wait for at least 5 straight days of double zeros. But, if not, then keep your stocking levels very low, feed only a tiny amount, especially for the first week or two (only as much as the fish will eat in 30 seconds) and continue to test every 12 hours to monitor your ammonia and nitrite. Do water changes every 3 days for the first two weeks just to keep everything coming up zeros. Then, slowly drop that to every 5 days and finally land at every week.
Keep the water change amounts high - 50%+. Water changes are the BEST tool that an aquarist can use for EVERYTHING! There basically is no issue in the fishkeeping hobby that won't benefit from a water change.