Can anyone recommend a good very beginners Japanese language class in Okinawa?

Hi all

I came here for a last minute holiday but I'm considering staying longer, can anyone recommend an in person (or online I guess) beginners Japanese course? I have some names from Google but I really don't know what will be good. I'm mainly looking for functional going to the shops, restaurants, navigating etc to get me started and then progressing from there

Thanks very much