Marketing - will work for free

#1
I am moving to BA for 3 months in January and I am hoping to get some marketing experience. I have been practicing as a lawyer for the past 5 years and have had some work consulting for an online clothing company. When I return to the U.S. I want to fully transition into a marketing career and some additional experience would be helpful. I am happy to work for free. I am open to all types of marketing positions and companies. I have a basic written and oral ability in Spanish/Castellano but I plan on elevating my language skills over the next two months. Also, I will be taking lessons while I am living in BA.
Any ideas on how to go about finding a marketing intern position?
Thanks,Christine