Congrats and welcome to the site! You'll find a ton of information here so definitely read, read, read!!
A travel agent is always a good place to start. You're on the one year mark, so I'm not sure if you'll get decent pricing yet or not. But just for fun, try itravel2000.com and put in Jamaica just for resorts. Get the details on the sizes and what they have for amenities and narrow down the list. Then once you start checking with travel agents, you'll have a short list of resorts to discuss.
We got married at Gran Bahia Principe Jamaica, but that might be a bit bigger than what you're looking for. The price is reasonable, and it's a great resort. Might be worth checking out.
Good luck and happy planning!