Reach early morning. Walk towards mission road (20-25 minutes from railway station) have some breakfast on the way. Take a scooty on rent (you can bargain a good deal upto 300/day). Go to kallialay surf school. They charge 1000/class. Have a session of surfing there from 10 am to 11 am. Book an Oyo. Checkin and go towards temple adventures for Registration of scuba diving. Pay 6000/person (if I remember correctly) take the lesson and be ready for a scuba dive next day. Come to main city have a wood fried pizza or lunch. Take some rest. Then go to aurobindo ashram and museum. Post 5.30 go to promenade beach, spend evening there. Go to a local restaurant have some fun.