I want to go to a solo trip.

I'm a 22-year-old female currently living in Mumbai. I have an 8-day window from November 27th to December 4th to plan a trip, but I'm unsure about the destination. I'm considering either Goa or Rishikesh; however, since I don't know how to drive, I'm not sure how I’d get around once I'm there. Also, goa is closer to mumbai but I think it would be much more expensive than rishikesh. Pls suggest any other places i can go to.