Pay attention to a few points before flying, it must be a bird raised since childhood, such a bird relative. First, practice at home, let the birds fly when they are hungry, practice with whistles, and give them food when they are right. Then, train them to return to their cages, release them when they are hungry, lure them back with food, and give them food when they are right. After several times, the birds form a conditioned reflex, so it is best to use passwords, such as saying "return" in training and "come out" in introductory training, so that the birds form a conditioned reflex. Pay attention to outdoor flight. Choose an open field with no trees around it, such as a playground. Take the bird out, lock it up and let it get used to it for a while before releasing it. Remember to let it out when it is hungry, let it walk with people, put it on the ground, make gestures or say "come up" (these need to be trained at home first), and give it food when it is right. After long-term training, birds will form conditioned reflex. Flying is very fulfilling. Be careful not to have anything that scares birds where you fly to prevent birds from escaping.
I hope it helps you.