If you don't have an itinerary all planned out I highly recommend going on a tour bus trip, it'll help you get the fullest scope of knowledge about Cuba. If you go with a normal tour bus you'll get some American-brained reactionary as the tour guide though, be warned, most folks who interact with tourists regularly are openly anticommunist (fancy themselves more imperial core than periphery I guess). I've heard good things about Young Pioneer tours and they've got a tour for this may day. My impression is that they won't be wildly reactionary, I hope 🤞, and I've recommended the tour to another curious Hexbear so y'all might be able to comrade it up.

Edit: Also if you're in Viñales PLEASE check out Heladería El Rapidito, it's so good and so cheap (like 30-40 cup per cone I think? That's like literally a quarter for delicious ice cream).