You cycled after the shrimp decayed and ammonia went down. There was no need to add more ammonia. It doesn’t hurt but doesn’t do much other than keep adding nitrates to your system. I would do a waterchange more so to be safe and get your nitrates to a level you want to keep the tank at. This also gets you in the habit of doing them and to get used to making sure all parameters are in order. I would add two of the qtd fish then a couple weeks later add two more.