With the test numbers you posted, your tank is done cycling. I’d take out the shrimp you just put in and just add some fish food daily instead. No need for the nitrates to get any higher, yet you don’t want the nitrifying bacteria you just developed to starve. Now you’ll want to bring the nitrates down with some big water changes. A 50% water change would bring them down to 80ppm. You’ll need to do several to get the nitrates down. Each 50% water cuts nitrates by 50%. Once the nitrates are down to 30-40, you could add fish (some might say you could add them at even higher levels but this is what I did). They’re not as bothered by nitrates as corals are and they would provide the ammonia from there on out. Since there’s nothing in the tank yet, big water changes aren’t a problem. They are a pain in the neck but remember that this is probably the only time in your tank’s life that this amount of water needs to be replaced. Good luck!