Yea it isn't generally a great industry as it is most often private sector work. Some enjoy it though.
As for fluency it is very country dependent if you need to speak the local language. A decent amount of the roles don't actually require it though obviously if you speak the language you will have opportunities for better roles.
I was just mentioning it as one of the few non STEM opportunities that exsist.
I am not familiar enough with the immigration situation in Cuba to answer that. Will need another comrade to assist with that information