I'd be weary of using the vinegar method on your ceramic coated car. While it's not going to ruin the coating, I'd use a method that is more PH neutral and therefore safer for the ceramic coating.
Method 1:
The least aggressive method would be to use a dedicated water spot remover such as CarPro Spotless. It is designed specifically to be less aggressive and more PH neutral for use on coated cars.
https://www.carpro-us.com/paint-deco...r-500ml-16-oz/
Afterwords, wash off the area with a PH neutral soap w/ no fillers. There are many products out there designed specifically for ceramic coatings. Carpro Reset soap is a good option but expensive, Chemical Guys Honeydew soap is a good cheaper alternative for regular washing. Essentially, you need to neutralize and wash away any acid on the paint after removing the water spots.
Dry the area and apply a Si02 based topcoat like Carpro Reload.
Method 2:
If chemical decontamination does not work, the spots can likely be removed with a very light clay bar. Use a dedicated clay lubricant as well.
https://www.carpro-us.com/paint-deco...clay-100-gram/
This will likely leave micro marring on the ceramic coating. This can easily be fixed by polishing with CarPro Essence Plus. Again, it was designed specifically for ceramic coatings. It contains no abrasives, and it will level/fill the micro-marring. This can be done by hand with a gloss polishing pad.
Method 3:
If the water spots are really bad, and etched into the paint, they will need to be polished out.
*No, I don't work for CarPro, i've just had good results with their products, and you can get everything you need in one place.