Which part are you going to? I don't live in India, but I've been before.
I haven't traveled around it much, but I think the states can be quite different, and have different laws etc.
For instance I think some are 'dry' states, meaning you can't buy alcohol, or in some states, it's more expensive than others
Right, Gujarat has prohibition, but a tourist can get 'permit'.
Since OP is coming on work, suggest settling down (September is fine, food system needs getting adjusted to). then there's the local scenario (South is more conservative).
If it is moving into cities like: Bombay / Mumbai, Goa or Bangalore - lots of info on net.
a better idea is to get in touch with westerners in these cities,
Mingle Search - I would do it!!