If you're talking about training/taming, Leah is right
. There is no way you can place a deadline on such a thing. Getting a bird to first open up enough to trust, then showing various steps toward tameness, then learning, takes (in many cases) a tremendous amount of time, and more time than many people expect. Consistency is key, and seeing progress in very small increments over time would be considered normal for a bird who does not yet fully trust. Good luck. What's the hurry, your tiels are long lived and you have plenty of time
. Keep consistent and you'll get there.