Hi Manoj, Cheers!!!! You are planning for a solo trip. Goa is a place you can set your eyes on. I was teary eyes as soon as I boarded the plane back for my hometown. You are lucky that it would be off season in Goa, so prices of the hotels, hostels and other things would be definitely low. Balaji Calangute Resort can be one of the choices if you want to stay near the beach. I would also suggest you to dig on AirBnB stays as that can surely help you. Advice: Take sunscreen SPF 50+ with you.
Try to avoid high tide areas.
If you are sensitive towards tan then avoid having fun in the beach during daytime as the sun rays fall direct on the skin causing sun tan and sometimes dry, flaky skin due to combination of saline water of the sea.
Carry water bottle with you as water is costly in Goa.
Try to bargain for the shacks as they can be provided for Rs100.
Never ever face your back towards the sea as you do not know the speed of tides coming.
Rest enjoy GOAAAAA. Have a safe trip!!!
July-Aug is off season in Goa, so rooms in Goa are cheaper during this time. You can try for OYO rooms in North Goa (near Candolim or Baga). In season time also, OYO offers decent rooms in North Goa at a very minimal price and during monsoon time, it will be much cheaper.