Cheap, nice place for a solo female to learn scuba diving?

Forums: 

Hello,

I'm a young solo female traveller, and I'd like to go Latin America somwehere nice, cheap and safe, where I can meet cool people at a hostel, learn scuba diving, do some fun activities, etc. I speak Spanish well enough to get around, and I've already been to Peru, Bolivia and Chile sola, and I've been to Mexico, Costa Rica and Cuba too, so ideally I'd like to go somewhere new. I was thinking maybe Colombia (Santa Marta) or Honduras, thoughts? suggestions? advice?

Please help

I didn't find the right solution from the internet.

References:
http://www.travbuddy.com/forums/viewtopic.php?id=48251
Creative advertising studio

Thanks