Hi,
Welcome to Thalpal, nice to meet you. Relax and don't worry, everything will seem normal once the routine starts.
Well for your recent doubt, most people are advised to start transfusion once Ferritin reaches 800-1000. Desferal is good, but I would like to stress the point that if you plan to use Desferal, use Kelfar (Defriprone) with it as well as a combination (very effective and used by many thals). As you are in India, there also is a Thalassemia magazine which you can subscribe to which will send you issues about their activity and what's new on timely manner.
Combination of Desferal & Kelfar, Desferal removes iron in Liver while Kelfar is effective in removing iron from heart, so both works in a complementing manner to each other. I personally take Asunra (Exjade) and many people from here take just it and their FE levels are maintained just fine.
I'm from Gujarat by the way. And don't worry, all will be good once a routine is developed, you'll recognize your child is no different than a normal one.
-P.