Babies fall when learning to walk, right? It's a skill that needs to be practiced. The answer to keeping babies safe is not strapping them to a chair, it is making sure that their environment is safe for them to fall in.
Birds are not born expert fliers. They need time and practice, too. Giving him a large area to work with, giving him bird approved areas he can land on (playstand, perches on the wall, boings from the ceiling, etc),covering mirrors and windows... All help give him a safe area to practice