Coming to Chennai for 24 hours, suggest me some interesting places to explore

I have a job interview on 20 January and will return to Delhi on the same day. In my free time, I would like to explore Chennai. Please suggest any places or activities I should do. Also, can you help me with some Tamil phrases so I don't get into trouble? Here is a photo from my balcony https://preview.redd.it/e8tno7jh1pde1.jpg?width=7868&format=pjpg&auto=webp&s=aa61df386150b3162bacd1ace0e37438748a0d8f