I would say yes, they can go now. Are you going to free range them or keep them in pen? If they are going to run around free then you perharps have to start when you are around yourself..just for few first times. As they are young and light, if scared they can quite easily fly/take off over 6 ft fence.
When you let them out..just open the door and walk away quietly..let them come out if and when they are ready. They may not wonder very far at first, but they will build confidence and will be here and there very soon. ;D