I had those braces like 9 years ago and had them for 6 months so I knoew what you going though, luckly for me, alot of people in my high school at the time had the same braces so I wasn't pick on, I love the idea at the time that you could change the colours on the rubber bands, I had red and green, pink and purple, yellow and green, red,blue,yellow green ( all at once) gold and sliver.
The first few days are gonna hurt but they are worth it as your teeth will look better, I had them at top and bottom set of my teeth but find some pain killers which can be dissolve in water to settle the pain and your teeth will be fine, for some reason my dentist gave me some wax to polish my braces with.
I avoid these food while you got your braces as they will break/ruin the braces or be a b*****d to get out.
Apples ( try bananas, they softer)
Rasins
bubble gum/ chewing gum
some sweets ( I got away with toffees by sucking them, also try loillpops)
nuts
Thats just some of them I can rember.