J.E.
You've already gotten good advice about caring for them and pain so thought I'd go another route.
My daughter gets hers off Tuesday - yay! She is most excited about eating corn-on-the-cob so I have to find some in Minnesota... That's really the only thing that she couldn't eat - lots she SHOULDN'T, but not much she couldn't find a way to do other than corn.
Have a fun party with everything she won't be able to eat - laffy taffy, corn-on-the-cob, caramel corn, etc. For her appointments, let her pick her colors. My daughter always did school colors at the beginning of each sports season.
Fortunately, it's common for kids to have braces so they aren't teased like they used to. I also don't think they tighten them as much as they used to at each visit because she's had very little pain.
When she's had pain, we make smoothies, milk shakes and Carnation Instant Breakfast.
Good luck!