Anxiety is a real thing for folks to deal with and it may take time to get back into being comfortable in a post-firework heard of sheep going to the monorail, so let's look at locations that you can catch your breath.
The best restaurants in the Magic Kingdom are a mix between fine dining affairs and casual sit-downs, offering some of the best sandwiches, light meals, and theme park fuel in all of Walt Disney World. It doesn't stop there: Dole Whip, and awesome snacks are also available.
There are more attractions in the Magic Kingdom than any other theme park in Walt Disney World, so when you put that alongside the fact that it's the most popular theme park in the world...setting expectations is really important.