I'm flying over on Wednesday. Hopefully staying, if not, this is at least 2 weeks groundwork for the permanent move. Did take 3 years of college Spanish, but can't really speak well yet, and only understand very slowly, lol.  Right now I'm just using the free duolingo app as much as possible. It might not help with the Puerto Rican accent and idioms, but at least you can pick up some vocabulary and get a sense of the grammar and verb tense, etc.  Good luck!