I think being clumsy is part of being a baby cockatiel. Mine both butchered their tail feathers with crash landings, etc when they were babies, but now that they're older and have grown their flight feathers they are totally fine. Cookie's got a full tail now, and Bailee is growing his.
He will. mine were bad for landing on each other lol. They have grown out of it. hugs had a tail feather pointing outwards. one day while preening i looked at it and it was bent so i bent it back in. Good as new.