Rupali, our daughter is also getting monthly blood transfusion since she is 2 months old. Her doctor in Boston told us that we will not start chelation till she is 2 years old, even though she will probably have more than 20 transfusions. You should ask your daughter's Thal doctor when they will start her chelation. The chelation is to be started under a doctor's supervision, no matter which method of chelation you decide to use.
About your daughter with TM, she will grow up as normal as any other kid as long as you are dilligent with her treatment and provide her the education to grow up as strong & independent person. That's what we want to impart to our daughter. But first, we have to be strong and that's what me and my wife are trying to be.