what was teenagers life in 2005s

hello, i’m writing a book set in 2000s and one of the characters comes from Sweden, he’s 16 and pretty rich but still lives on average level.

I’m wondering if any of you could tell me more what was life back in the 2005 when you were a teenager? i’ll take literally everything: culture, sayings, school, after school, meetings, subcultures, main events for teens, styles, clothes, movies, music, books, concerts, like anything that’s important and was a big thing