Almost right. It's both a political and a technical issue. Like you don't get a whole country with access to the internet from one day to the other without signing a contract with the devil (whatever that is). So, it takes time, but it is happening, Cuba is getting online, and there's no step back.
Cuba already has a fiber optic cable to Venezuela, so they can get all the Internet they want and need into the country.
Cuba already has a national backbone, so they can get the bits distributed to every city.
Cuba already provides Internet access to government and educational institutions and some businesses, so they already have the capability to provide intenter access, even if so far it's been in limited quantities.
There are plans to provide ADSL service and Internet access can also be provided via existing wireless networks. There are also informal wireless networks that could be used to,get Internet out there to the people.
The Chinese will sell them as much network equipment as they want. They already provide the most of it anyway.
There are very few technical issues. All the Cuban powers that be need to do is unrestrict access and allow the use of existing infrastructure.
EDIT: all of Cuba could have some level of Internet access right now if they just allowed satellite usage.