Congrats and Welcome!
We actually looked into that resort as well since we are also doing a Catholic ceremony. I did get in contact with them to ask some questions in the beginning, and they were very nice and helpful. Here are a couple slide shows of weddings photographed by Del Sol there. The first one is of a Catholic ceremony and the other is just in one of their gazebos. Maybe it will give you a good idea of what it could look like!
Just start by choosing your date and location! From there make a list of the people you want to invite and get the word out asap so people can start planning for your big day! Once you have that stuff, its just a process of checking small and big stuff off the list. You can make it as easy and simple or as elaborate as you want! Just don't stress your self out. I would suggest you get your Pre Cana out of the way as soon as you can. Depending on your diocese/parish, it can be quite time consuming.
Good luck with your planning! You will find lots of help and support here for anything you need!