Help: finding a school in Chennai

I've asked r/India and r/TamilNadu regarding this, but I thought the people over here might know some more specific information.

I need some suggestions regarding schools for my brother. He has special needs. He is currently finishing 1st Grade, but his current school (an international one) wouldn't admit him for another year.

I'm looking for schools that won't refuse admission to a special needs student. Also, looking for a school with accomodations like shadow teachers etc. I don't mind whether the school is ICSE, CBSE or state board, hopefully the fees is reasonable. I worry about abuse in schools - cuz my brother doesn't talk much about what happens there.

Any suggestions are welcome. Hopefully we become more accepting and accommodating in the future - other people wouldn't need to go through what we have to.

Edit : thank you for all the support and suggestions! I really appreciate it :)