Well it indeed looks like you are cycled. Congrats. For the next couple of days I'd still test your levels to make sure it wasn't a fluke, but IMO
you are done FOR THAT AMOUNT OF FISH!
It is not unheard of, but is unlikely, for there to be no nitrIte readings. Since you had the ammolock filter insert in there that can also mess with results causing you to have been cycled a couple of days ago but still seeing slight ammonia levels.
Either way, the end result is what matters, and you didn't appear to harm the fish to badly. I'd wait another couple of days before thinking about getting fish, but when you do, I'd cut feedings to 1/2, and watch the levels. If the ammonia or nitrIte show up continue with the 1/2 feedings and do PWC
as needed. Otherwise, you can go back to normal feeding.
Congrats on a successful FISH cycle!