You got engaged on our Vow Renewal date (well next year)!
A great place to start is SRUAlmn's step by step planning journal.
http://www.disboards.com/showthread.php?t=1192969
One important tip I just figured out is that if you do a search for any topic on this board, it's better to use the abbreviations than writing out the whole word. For example, you'll get a lot more results from typing GF than Grand Floridian.
I just called Disney while you were getting engaged. Disney will hold your date at the one year mark at the earliest. Since you are getting married next April, you should probably call immediately and see if that date and times you want have already been booked at the location you want. Just so you know what's available, or if you have to be flexible. Once you ask for a date, Disney will pencil it in and send you a contract. You need to fill it out and send it back with a $750 deposit within 2 weeks for them to actually hold that time, date and venue for you.
There are 3 kinds of weddings Disney offers: an Escape (or Intimate) wedding (for less than 20 total people) which offers some standard amenities like 2 annual passes,minicake, champagne, bouquet, 4 hours of limo, and 20 photos for $4000, but no reception or officiantis included; a Wishes (or Custom) wedding if you have over 18 guests, I think they have requirements of spending over $10,000 to Disney and a certain number of hotel rooms need to be booked; and now there are Couture weddings which have super-fancy themes and cost a minimum of $75,000 I believe.
So I guess first decide how many guests you're having, what your budget is and where you want your venue to be. A good place to start for some succinct info is
www.mouseweddings.com. It gives an overview and pictures of most of the venues and dinner sites. I found it valuable since that was where I learned that there were some party size restrictions at some of the Escape venues. Also keep in mind that if you are having a large party the restaurants will probably seat you at the earliest or latest seating, unless you book a private room.
Congratulations, and happy planning!!!
Jil