It's easy. Simple as that. Honestly it doesn't matter what you do. Just stay in your lane. Grades are easy for the most part, and teachers are usually chill.
If you meet a weak minded person who likes starting fights, just back down. It's not worth your time.
Also, high school friends are mostly temporary. You'll most likely never see some of them again after you graduate so that's that.
The original word or phrase is known as the subject of the anagram. Any word or phrase that exactly reproduces the letters in another order is an anagram.