Hi Crystal,
Welcome and congratulations.
Take a deep breath. You've got plenty of time :-)
Check out the Jamaica forum, there are several of the more common resorts as well as threads about some of the resorts that are off the beaten path.
I'm a Jamaica bride myself and since our wedding party is only 8 people I chose an adult only Couples resort with a pre-set wedding package but there are brides with much larger weddings that have more customized venues and ceremonies.
You can also contact the TAs, they can give you some great ideas as well as help you book.
Happy planning!