Highschool isn't that bad, a lot better than middle school

It's not scary

Senior here o/
I had the same mentality as you when I first entered high school, however high school isn't terrible as others say it is. Sure it's quite nerve-wrecking, but you'll get used to it. Just take classes that suit your preferences.

Just pay attention and don't slack off (essentially, don't be me) and you'll be fine