Braces in Los Angeles

Orthodontists in Los Angeles California

I got braces a few months ago. I went to the dentists for the first time in 6 months today and he said that drinking gatorade and powerade and other drinks like that is bad but he didn’t really specify all the different kinds or anything. So I was wondering if things like juice, coffee, lemonade, etc… are okay to drink.

I have my orthodontist in US. But I need to go back to my country. Is that okay for me to change my orthodontist? Or should I wait until everything finished before I go home?
What are the good and bad things if I move back home?