Hi Deanna...first of all, let me tell you that I am extremely jealous that you're leaving for the DR tomorrow!
Okay, now that that's out of the way....I'm not familiar with your hotel however I can tell you that free scuba lessons are given at the Decamaren Resort (Juan Dolio) by the Boca Chica Resort Dive Centre. You do not have to be a certified diver. Below is a copy of a post I recently made in response to someone else's dive question:
The diving in the Boca Chica area is quite good. There is a PADI dive centre run out of the Boca Chica Resort's watersports centre. The number is 809-523-4521 ext 353. Dives are $50 U.S. each...less if you buy a package. There are divers there who speak Spanish, English, German, French and Italian. Your dive will also be recorded on a professional quality video available for you to purchase at $50 U.S.....Tell them Jodi sent you.