What can I be sure of after only one week in Havana? Very little.
There are exceptions to every pattern, and sometimes more exceptions
than patterns. But a few claims, I think, are possible:
1. The sea and this island in it are stupendously beautiful even to someone longing for people and places up north.
2. The people of Cuba are sincerely warm and friendly. And, although they know the history of U.S. aggression, they sharply distinguish the U.S. government from the U.S. people. They are surprised and delighted to encounter the latter. (Americans might do well, likewise, not to identify the Cuban people with their government.)
3. The poverty here does not approach that in much of Latin America and the Caribbean -- despite the blockade (what Cubans call the embargo since the U.S. effectively prevents other countries trading with Cuba too).
4. The safety, security, life expectancy and in many ways the quality of life are high by any standard. Key West has worse food, more alcoholism, more militarism, and more money.
5. U.S. tourists will love Cuba. For the left, Cuba has socialized education, healthcare, and a basic income guarantee. For the right, Cuba has meat, machismo, meat, the war on drugs, cigarette smoke at the next table, and more meat. Welcome here are atheism, Catholicism, Santeria, and whatever else you've got. For everyone, Cuba has the beauty, culture, and adventures to match any destination in this part of the globe.
Could I live in Cuba and write in Cuba? Possibly not. The rebels in Cuba rebel against the failures of their government, and that runs up against two problems. (1) People read. (2) The government fears dissent as U.S.-funded propaganda for regime change (which a lot of it is, to the tune of $20 million U.S. tax dollars per year). In the United States I can write because no one reads and the government trusts everyone to go shopping and watch TV -- which is full of commercials, unlike Cuban TV, thus producing more shopping.
The opening between the U.S. and Cuban governments is very, very strange, because the United States does indeed want to radically change or overthrow the Cuban government, and the United States allows terrorists who have repeatedly and openly attacked Cuba to live free in the U.S. For over a half-century the U.S. has used Cuba as a lab for testing military techniques, propaganda, infiltration, sabotage, and bio-warfare -- with the result being complete failure. But without recognizing the absoluteness of that failure, much less regretting the immorality of the crimes, the U.S. wants to "normalize" relations with a government it hates and wants to put an end to.