Havana ? At the darkened Delirio Habanero nightclub on top of Havana’s National Theatre, a group of young Cubans listen to an all-girl band, dressed in micro miniskirts, belt out salsa lyrics. Through the windows behind them, the glowing faces of revolutionary heroes Che Guevara and Camilo Cienfuegos shine down, outlined in neon several stories high on the facades of neighboring buildings. The young people are too busy texting to take any notice, even as the older folks dance.

Cuba is a society going through immense changes — generational, economic,and, at some level, even political. These changes were underway even before President Obama made his historic announcement Dec. 17, 2014, about restoring relations.

On a recent “educational” trip to Cuba (U.S. law still prohibits vacationers from visiting as tourists), I met with a broad cross-section of Cubans, including academics, students, doctors, artists, economists, bloggers, and private businesspeople. Here are some snapshot impressions from my first visit there that barely touch on the ferment in Cuba today:

Tourism. Now that Washington has loosened travel restrictions, the flow from the north has soared, with as many as 23 charters a day flying in over the Christmas holidays. In Miami, long queues of families carrying flat-screen TVs, bicycles, auto parts, and huge shrink-wrapped packages for Cuban relatives snaked through the airport.

That’s even before Washington and Havana allow scheduled U.S. flights to Cuba, rather than charters, an influx that may be more than Cuban officials can handle. Even now, airport workers look overburdened, and buses are beginning to line up on Old Havana’s still relatively empty streets.

The impact is already stunning: Old Havana’s famously beautiful but scabrous Belle Epoque and Art Deco buildings, including those along the Malecon seaside drive, are being renovated and painted in elegant creams and pastels at an astonishing rate. Much of the work — turning decaying giants into elegant boutique hotels — is done by Habaguanex, a holding company run by Havana’s city historian, Eusebio Leal Spengler. He is determined to prevent the old quarter from becoming a high-rise hell.

But tourism’s upside also reveals Cuba’s economic downside: Young professionals are abandoning their work to get into tourism, because it pays astronomically more than what they make. I met engineers and doctors driving taxis and well-known actors waiting tables.

Economic reform. The desire for a better economic life is the main driver of the flood of educated young Cubans, ages 25 to 35, including thousands of low-paid doctors, who are migrating to the United States. Under current immigration rules, they get preferential treatment. “They see that their parents have less than their grandparents did,” one young Cuban professional told me, “and they want more than free education and health care,” which they get in Cuba. Now that their country is more open to the world, many young Cubans want the consumer goods that their American relatives have.

No longer subsidized by the Soviet Union or Venezuela, the Cuban government is laying off state workers. Anywhere from 25 percent to 50 percent of Cubans work in the private sector full or part time. Besides B&Bs, there is an explosion of private restaurants, located in large homes. Of course, Cubans blame much of their economic problems on the continuing U.S. embargo. Even were the embargo to be lifted, however, the government would have to decide to loosen much more control in order for the economy to thrive.

“We are going from blaming every problem on the USA,” said one knowledgeable Havanan, “to saying we have to change.”

Political freedom — and the Internet. “This is a difficult time,” a thoughtful Cuban told me, “because the young want immediate change or they leave, while the older generation don’t want change at all.” This dichotomy isn’t wholly correct. But Cubans are anxiously looking ahead to 2018, when President Raul Castro has said he will retire, and to the Communist Party Congress in April, and hoping both will elevate a younger generation of leaders who will deliver real change.

Most Cubans I spoke with were more interested in economic reforms than political ideology. But most don’t want to give up their extensive social safety net, even though the government can barely pay for it.

No formal political opposition is allowed in Cuba (human-rights groups say dissidents today tend to be harassed and detained for short periods rather than long prison terms). The migrant exodus helps ease pressure on the government for reforms.

But there is intense debate about the future among intellectuals in groups such as Cuba Possible, or around Temas magazine. The government controls all media, but the number of bloggers is constantly expanding, even as government limits on the Internet sharply impede their reach.

Home — or office — Internet is limited to certain categories of workers (some find ways to circumvent this). Young Cubans cluster at night in dozens of recently opened public WiFi zones — often in parks — to surf the Web, but the government says home access won’t expand greatly until 2020. Over and over, Cubans young and old told me these limits symbolize government reluctance to relax control. But that level of control is getting harder to maintain.

U.S.-Cuban relations. The future of this relationship will be essential. The new ties both excite and frighten most Cubans I spoke to. They don’t want to be dominated by the United States, or have Americans buy up their old cars and buildings. But they hope that closer ties will mean better economic times for Cuba. They look for more openings to promote their rich cultural heritage — and their baseball teams. They say Obama will be warmly welcomed if a proposed visit materializes.

In a time of ferment, such a visit is sure to have intriguing results.

— Trudy Rubin is a columnist and editorial board member for the Philadelphia Inquirer.