What a very nice start to your vacation and TY for sharing it.
Not knowing the severity of that sunburn, I did a number on my lower leg one trip and someone on TTOL suggested a trip to the nearest pharmacy to purchase an OTC salve called BIAFINE.
It is an incredible product and reduced the pain from my sunburn to a tolerable level almost immediately. To the best of my knowledge it’s not typically available here in the States though I understand it’s routinely used in hospital settings for radiation Burns.
Hope the rest of your trip goes well and again, TY for sharing so far.