My 2 greys were clipped when I got them, as was my Amazon. When Talon learned to fly, she was exhausted, huffing and puffing like my others were also. But she learned on her own, quickly. Rikki my grey, took a very long time to get all her flight feathers, and struggled to learn to fly after that, She crashed alot, she was almost 3 at that time. She now flies very well. My amazon was taught to fly by my youngest son, when he was 11. He would hold her on his hand, lightly run with her, then say fly, fly, and lightly push her for take off with his arm movement towards the soft couch, the momentum helped her to fly a bit and land onto the couch. He did this with her several times a day, and it helped her to build up her muscles and her strength, as well as her confidence. She loved it! She is now a very good flier, just like a missile!! Watch out if she comes at you, you better duck, or you will have a head on collision with her, she has so much power behind her. Not like my greys, who are so fluent and light!
It is an instinct, that they all have and will figure out, just be patient.....hard to watch sometimes, but just like out children, they will fall, get back up, and try again until they master it, and they will!!