Welcome to ScubaBoard!
Good luck on certification. You can learn a LOT about diving by hanging out on SB.
I don't think there is an LDS in Trinidad. The closest maybe CO Springs. That is a bit of a hike, but you can do the class over a weekend if you choose, and maybe just drive up, and stay in a hotel. Or you can do the class over two weekends most likely. There are at least two shops out of CO Springs, Underwater Connection, and Divers Reef.
We make trips down to the Blue Hole about every other month, and you are an easy 3 hours dive from that area which is much better than the six hours we do each way living in the Denver Area. There are at LEAST two groups of folks diving in the Santa Rosa from the board in December, or at least that is the plan. Once certified you are welcome to join us, and you are welcome before getting certified, but Santa Rosa is not exactly an entertainment Mecca even if it is a fun place to visit at least once.
Good Luck,