Hi, Zainab!
I am glad to help with your Walt Disney World planning questions!
Details of the Deluxe Dining Plan can be found
HERE. When ordering, there is no price limit on your selections from the menu. Each meal includes an entree and a dessert. You also get a non-alcoholic beverage. This usually means a soft drink, coffee, or tea, but for some restaurants, it does include milkshakes or smoothies. Ask your server for the choices. My favorite places where milkshakes are included are Whispering Canyon Cafe in the Wilderness Lodge and Sci-Fi Dine-In Theater in Hollywood Studios.
Now we need to get you to your dining locations! From Hollywood Studios, you can take a bus to Epcot (your quickest option.) You can also take a boat or walk, but allow a good 30 minutes. To get to Epcot from the Magic Kingdom, you will want to take the Express Monorail to the Transportation and Ticket Center and transfer to the Epcot Monorail. Allow about 40 minutes transportation time, then another 20 minutes to get to your restaurant. (Epcot is huge, so allow plenty of walking time to your reservation.)
It sounds like you plan on some great dining while in Walt Disney World! Enjoy!