Thanks for the great report from Cuba!
Barracuda and big jacks on the trout rod - now that is Extreme
I'll bet your Cuban friend was very grateful for the present of the rod.
Barracuda is a great fly rod target - they make great acrobatic jumps when they are hooked but their teeth asre razor-sharp you need to use a short wire bite-tippet.
For a general introduction to saltwater flyfishing I think one of the best books out there is Lefty Kreh's "Fly Fishing in Saltwater". You should be able to find it online at Amazon etc.