You're going to need to add a source of ammonia to cycle your tank. Either pure liquid ammonia or fish food. Liquid ammonia is much easier to achieve the desired amount which is 3-4ppm. You won't do any water changes until your tank processes 3-4ppm of ammonia in 24 hours, then you will do a WC to bring nitrates down, redosing the ammonia back to 3-4ppm to double check. You can then begin stocking your tank.
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