https://www.bbc.com/food/chefs/madhur_jaffrey
India has a wide variety of cuisine, and depending on the area/s that you are visiting, fish, meat, or vegetarian styles will be more prominent in some areas more than others. Kerala, for instance, has a very different food style to other parts of the country. Madhur Jaffrey has written lots of recipe books, and I am sure you could find her TV cooking shows on YouTube, and books in the library. She is wonderful, and has a very easy way of describing and demonstrating her recipes.
There are many other excellent Indian cooks too of course, and I really like these two guys:the incredible spice men.
https://www.bbc.com/food/programmes/b0394f74
I would look at a lot of books, and try some recipes from them.