Dolores, if you’re not comfortable driving then don’t, there is no need given where you staying.
So to answer your question, Lotterie farm taxi for sure. Mullet bay beach is a short safe walk during the day, in fact better to walk than to find parking. Porto Coupecoy is walkable but it’s a bit of a hike, wouldn’t do it at night so for groceries and alternate restaurants that are walkable and safe don’t discount Jordan village which is literally across the road. There is a relatively new market across from Rainbow and Carrefour express is in the village, also Jules is a great little bakery, probably 6 or more restaurants in Jordan as well, Barcode, Fat Tony’s and Spaghetti House are all good. Don’t forget one of the best Italian restaurants Mario’s is in your building. The new beach restaurant Kalatua on Mullet is nice and provides shuttles to the former Starz Casino which is across the road from The Cliff. There really is a lot very close to where you are staying.
Bill and Elaine live next door at Rainbow and might also have suggestions..