Okinawa in October & No Car

Question for those who have been to Okinawa without a car, where on the island did you stay and how did you get around?

I was thinking somewhere like Onna because we want beautiful beaches, outdoor activities and relaxation but realise without a car we might be pretty stuck. Is there DiDi, Go, JapanTaxi, etc there?

Where else would you suggest to go?

We also think Chatan might be cool for like a day or two.

Also, we’re thinking to go in October. Has anyone been then? What are the crowds and weather like?

Thanks!