(All coming from my opinions, schema, experiences, and etc.. I'm limited in knowledge. All of what I could say could be fallacious, inaccurate, irrational, etc.. Most things I say are suggestions. I don't intend any offense, and sorry if I do.)
Maybe I'm too late, but **** it.
This may be too far into the future, but please consider community college as an option- instead of some place that doesn't measure up to other colleges and universities. It can save you a shitload in the future, man. Also, save up money when possible- oh God. Just save, save, and save.
Anyway, for high school. It's not as bad...well, for me it wasn't. Just know your "social norms." Most students in there are probably a bit nervous as you, just saying. Get your shit on time. If you seem too "aggressive," there's probably a chance that you may seem like a threat to others. Most things said in high school may be dumb as shit. Some people like to attention *****, some people like to insult people because that's the only way they know how to get a laugh from people, and some may laugh because they just do it out of habit. So yeah, I suggest not taking things said in high school (At least from people who aren't your friends.) seriously, but at the same time, listen to what others have to say, it could be beneficial- like if you have some sticker on your back. Or, if they want to give some constructive criticism- regardless of it being "negative." Sensitivity in high school can be an issue, so you may want work on that if you're having problems with that already. Use a condom unless you want to get a good start on making the most children in the USA.
OH, and peer pressure, HA.