I understand that when you say "Spanish Country" you mean any country in which the Spanish is the official language. I'd like to know if you have already a base in Spanish. If you do, the Dominican Republic could be an easy, most friendly and cheap alternative for your stay. The people there are very kind with visitors and eager to help with the Spanish. Think it over.

If you come to Spain from the Bahamas, probably the cheapest and the only way is by plane through US. I do not recommend the boat ;)

You want to go Spain? Or just country with Spanish speakers? lol if you mean the latter option go to Cuba... it's just in the other side of the bay.