Thinking of selling my My Home Sayuk flat. What should I be careful about?

I bought a 3 BHK in My Home Sayuk, Tellapur a few years ago when I was working in Hyderabad. I have since moved abroad, and I'm now considering selling the flat rather than holding it as a long-term investment.

The property side seems fairly straightforward. The part I'm less clear about is the process because I'm now an NRI.

A few things I'm trying to understand before I actually put the flat on the market:

How the TDS under Section 195 will work when the buyer purchases the property from me?

Whether I should use a Power of Attorney for the sale since I currently live abroad?

What documents the buyer, bank and registrar will need from me?

How the capital gains tax will be calculated?

Whether the sale proceeds can be transferred back to my overseas account and what FEMA conditions apply?

Whether the money first needs to come into my NRO account and what the repatriation limits are?

For context, My Home Sayuk is a 25.37-acre project with 12 towers and 3,780 apartments. The project has also received its occupancy certificate, so I'm looking at an actual sale rather than an under-construction transfer.

What I'm trying to figure out is whether there are any NRI-specific complications that people usually discover only after finding a buyer.

For anyone who has sold a Hyderabad property after moving abroad, how did you handle the POA, TDS, capital gains and repatriation?

Did you use a CA and property lawyer from the start, or was the process manageable through the bank and builder?