I highly suggest that you go to the Andaman Islands. These group of islands are among the most beautiful places in India. There are a lot of things that you can do in this place. Since you mentioned paddle boarding, this is an activity that is quickly growing in the area. There are several resorts in the region that offer this sport. I have to warn you though, the cost of vacationing in the Andaman Islands can be a bit more expensive compared to other destinations in the country. Have and enjoy! I hope this helps.