Different varieties and different sizes warm up to being hand fed at different times. Your fish are small, and small fish have a heightened flight response that will reduce with size, but if you will spend time pond side daily, putting food out and waiting for them to eat it, they will figure out that you equal food, and will start to warm up to you. Varieties like the Chagoi are notoriously friendly and will be the first to come to the hand to eat and by doing so, will show the others that if they want to get any chow, they will need to overcome their fear. Only one of my fish has been that small in the recent past, born in my pond last year, and it still tends to be evasive, while many of the large fish will come over to be played with and eat from the hand.
As was mentioned, get the test kits for ammonia, nitrite,nitrate, pH and KH as you will need them, particularly during startup.
Welcome to Koiphen.
Zone 7 A/B
Keep your words sweet. You never know when you may have to eat them.
Richard