you should definitely try it!
My husband and I just returned from a trip to CSS and I finished my PADI cert while there. The intro pool class takes about 2 - 2 1/2 hours. The dive actually probably won't be deeper than 20 feet. They will make you so comfortable with what you are doing, you might end up taking the full cert classes while you are there! Everyone should try scuba once to see if it's something they would enjoy. It really is a fantastic experience. Michael, Patrick, Leon and the rest of the CSS dive team will take excellent care of you.
The intro class covers basics such as establishing and maintaining neutral bouyancy, recovering your regulator, breathing with a regulator, etc.
Have fun diving!
Gayle & Warren