Yes, that's totally normal. Slowly over time he may get on your hand without millet, but for now do not try to do that. Just keep showing him that your hands are safe, they have treats and they will never try to grab or harm him. When you need to reach in the cage to clean or change food and water, do it slowly and talk sweetly to him. Don't react if he reacts, like if he flies about the cage trying to "get away" from the hands, just stay calm and slow and talking sweetly. Try not to make any sudden movements with your hands and arms when near his cage at all. It takes them a bit of time because they are instinctually just trying to stay alive and hands are something they know could harm them. We have to prove to them that we will not harm them! When they do finally believe and understand this, it feels so sweet because it is not in their nature to trust us huge meat eating mammals.