Cuba has trade agreements with many countries already.
OK. Doesn't help that much if you don't produce stuff does it? Hence my comment that it probably matters more that they adopt free trade internally.
They are starting produce stuff. For example they have a growing biomedical industry.
There are also reforms being put in place to correct what you are calling "internal free trade."
In 2010, Fidel Castro, in agreement with Raúl Castro's reformist sentiment, admitted that the Cuban model based on the old Soviet model of centralized planning was no longer sustainable for the Cuban economy. While both leaders remain committed to dialectical materialism, they are encouraging the creation of a co-operative variant of socialism where the state plays a less active role in the economy, and the formation of worker-owned co-operatives and self-employed enterprises is being encouraged.[48]
To remedy Cuba's economic structural distortions and inefficiencies, the government has reformed the Cuban model as the Sixth Congress approved expansion of the internal market and access to global markets on April 18, 2011. They anticipate full implementation by 2015. This is considered an updating of the Cuban socialist model, although is commonly referred to as economic reforms. A comprehensive list compiled through an examination of articles from Carmelo Mesa-Lago, Jorge Dominguez, Omar Perez Villanueva, Vidal Alejandro, Philip Peters and the Economist outlining the main policy guidelines (Lineamientos) is as follows:[49][50]
##Budget expenditure adjustments (education, healthcare, sports, culture)
##Change in the structure of employment; reduce inflated payrolls and increase work in the non-state sector.
##Legalizing of 201 different personal business licenses
##Fallow state land in usufruct to leased residents to plow
##Incentives for non-state employment, as a re-launch of self-employed work
##Proposals for creation of non-agricultural cooperatives
##Hiring of labor by self-employed (cuentapropistas)
##Legalization of sale and private ownership of homes and cars as of October 2011
##Greater autonomy for state firms
##Search for food self-sufficiency, gradual elimination of universal rationing and change to targeting poorest population
##Possibility to rent state-run enterprises to self-employed, among them state restaurants
##Separation of state and business functions
##Tax policy update
##Easing travel restrictions for Cubans
##Strategies for external debt restructuring
On December 20, 2011 a new credit policy allowed Cuban banks to finance entrepreneurs and individuals wishing to make major purchases to do home improvements in addition to farmers. "Cuban banks have long provided loans to farm cooperatives, they have offered credit to new recipients of farmland in usufruct since 2008, and in 2011 they began making loans to individuals for business and other purposes", (Peters 2012, 21).[51]
Raul Castro signed law 313 in September 2013 in order to create a Special Economic Zone in the port city of Mariel, the first in the country. While this was also criticised in the general direction of criticism SEZ's have received, it was also a different economic model for the country.[52]
On 22 October 2013 as part of Raul Castro's latest reform they plan to unify the currencies, thereby ending the dual currency system.[53]

