Sounds like you've already picked your parks and days...great start!
My next step, if I were you, would be to think about whether I want to do quick service (QS) or table service (TS). QS can be a little stressful during busy times because you have to grab your tray of food, find a table, etc, but it is much cheaper and faster than TS, so it's great if you don't want to spend too much of your park days eating. TS can be a useful way of giving everyone a break from the heat and the walking, but is more expensive and can take an hour or two. (FWIW, we usually do one TS per day while we're in the parks, and we tend to switch between lunch and dinner, depending on what reservations are available).
Once you've decided whether you'd like to go TS or QS, start looking at menus/reviews/etc!
Some things to consider:
-Is your kiddo a picky eater? That can be an important limitation to consider. No use in spending big money on a TS meal at a restaurant where he won't eat anything on the menu!
-Some reservations are easier to get than others. It can be helpful to have a backup restaurant in mind in case you can't land the reservation you want.
-World Showcase in Epcot is a great place to "snack around the world." This can be a really fun way to spend an afternoon, especially if you aren't committed to a set lunch and dinner.
-Someone previously mentioned Disney Food Blog (DFB). They have FANTASTIC
YouTube videos, and honestly, you could plan your entire trip by watching AJ's videos. Highly recommend!
Finally, don't stress too much over meals! "Worst" case scenario is you eat QS the whole trip, and you just hit up the nearest restaurant whenever you're hungry...and I put "worst" in quotes because it's really not a bad thing. Just depends on your family's vacation style and dining preferences. If you give us more specific information, such as, "we'd like to eat at a TS restaurant in MK but I/my kid/my spouse will only eat corn dogs, pizza, and fries," then folks on this board are great at suggesting specific restaurants.
Happy planning!