Some tips..........
Not all restaurants accept credit cards and we used more kuna then anticipated. No problem in obtaining kuna and we found the exchange rates and food pricing to be of great value. As a rule we found the further north and inland we went the better the value. Head south and to island villages and the prices escalated with Dubrovnik leading the way.
If you have a kitchen then stop at the Green Market to load up on local produce, fruits, meats and cheeses. The market is adjacent to the east side of the old city and easy to find. Typically best before 10 a.m. to shop with the locals.
Use the main city gates by the port as your navigation point to all things Split (consider it the center of a hand watch). At the Information booth pick up a small foldable map to help navigate the area. The majority of destinations are maximum 20 minute walk. We stayed due west of the old town (use Google Maps to locate Bana Jelacica street) in a quaint remodeled VBRO amidst locales and other rentals. A quiet area enabling finding good places to dine at less expense rates then found within the old town (try the homemade tomato soups, it's always delicious. Clean the bowl with the excellent crusty bread.). Locate Ujeviceva poliana (at the 10 position on the hand watch outside the old city walls) and you will find locals shopping, eating, relaxing and a less hectic pace. There are several grocery stores, wonderful restaurants, a great barber, pharmacy and my sign of success for being out of the tourist zone; a pawn shop! Pawn shops are wonderful places to engage the owner to learn more about the area, find hidden gems at low cost (always haggle!) and to peel back a couple of layers of tourism. Another gem is finding second hand clothing shops which are equally fantastic. On the other side of town and walking past the hustle of the port, you will find at the 5 position on the watch hand access to the local beach. This is a nice cove of beach sans much sand, but where you can enjoy a dip in the sea and relax on your own towel. Within the cove is an area offering food, drink, changing area and toilets (btw, always keep small change for use of toilets). Folks tend to perform the "beach towel dance" to discreetly change in/out of attire and you will find all ages enjoying the area. FYI: as you walk past the port area there are several small grocery stores offering goods to create your own picnic. Which reminds me......We used the bus to transit to and from the Split airport. Upon arrival at the airport walk out to the main parking area and the bus awaits on your left. Double check to make sure you are at the right bus, toss your luggage in the storage area and climb aboard to grab a seat. The driver will come by to collect 30 kuna (current price one way cash only) and when the bus is full off you go. You will be deposited adjacent to the main port and once you have gathered your bearings, should be within walking distance of your accommodations (as long as you are not a pack mule for luggage). OH! Bring less clothes as several clothes washing centers are available in Split. Where we stayed the good old clothes hanging lines were available for flapping your under garments for all to view while drying! I am leaving the traditional tourist destination descriptions to others to describe. If you like true football the stadium is at the 11 position and a 30 minute walk. Check the schedule for availability as the Split team is excellent, but don't say that to anyone in Zagreb! Keep in mind Split has an excellent port offering a variety of ferries capable of being short trips to sea accessible villages. Do a little research at this web link: https://www.croatiaferries.com/ferry-timetables.htm. We sojourned on a small ship cruise and enjoyed the experience of traveling the method utilized for centuries within this region. We loved the Croatian folks and met kindness at every turn.