You don't have to go up to specific people and try to start a conversatiom, bruh. No one does that.
Just like .-. participate. For example, yesterday some girl who sits at my table was wearing a Juice WRLD shirt so I said "yo nice shirt bruh." and then she smiled and said thanks. Now she's comfortable enough to start a converstaion with me because I was friendly.
And another thing,,, group work. Just f**king participate. School is so damn important because that's like... the only time most kids are actually exposed to people. Blurt shit out in class once in a while. Make a damn joke.