Hi Abigail,
You're going to have some great meals while you're at Walt Disney World!
There is great information about the Disney Dining Plans online. On the right-hand side of that page are links to brochures about the Disney Dining Plans. You can check to be sure that any restaurants you are considering are a part of the Disney Dining Plan.
Since you already know a lot of the places that you will be eating, I suggest that you figure out the cost for a day or two of your meals on your trip. In their dining section, the website allears.net has recent menus and pricing for most Walt Disney World restaurants. Chose where you will eat for a day, chose what you might order, and add up the total cost for the day. The Disney Dining Plan includes one quick-service meal, one table-service meal, and one snack for each day, plus a refillable drink mug. Compare to see if a day of your meals is more or less than a day of the dining plan. When you do this, please remember that Cinderella's Royal Table requires two table-service credits per person. For an idea on the breakdown of pricing of the Disney Dining Plan, you can visit wdwinfo.com. Click on the "dining" tab and then go to the "Disney Dining Plan" on the drop down menu.
I love eating on Disney's BoardWalk. My family really enjoys Kouzzina by Cat Cora, which features Mediterranean fare. We also enjoy Big River Grille and Brewing works for a casual burger and beer, and it's always fun to visit the ESPN Club - especially when there's a game on! At Downtown Disney, Bongos has delicious Cuban food, and Raglan Road Irish Pub and Restaurant has a fun Irish pub vibe. All of these restaurants are listed on the Disney Dining Plan.
I hope that this information helps, Abigail. Happy eating!