How do I start my first day of class in high school, please give me any advice in how to act, what to say, where to go, how to get there?

What exactly do you want to know? How to act, what to say, where to go, how to get there? We need a bit more info than what you've provided.

I'd like to suggest that you just not mind asking the other kids who've been there before. The upperclassmen/women will likely take a lot of satisfaction in "showing you the ropes" that they've already learned. It will give them a sense of power. And guess who will be helping them to get that special feeling--you! They will see you as recognizing that they already own the turf! And they will probably remember that you gave them that chance.

Act like yourself, and on that first day, "yourself" may need a little help. You are there, and they are there, and we are here. Perhaps you can find more help there as to the answers to your questions.

But I think those of us here like that feeling of power too. So thanks for asking. And ask this question with more detail as someone suggested and ask other questions, also, if you want to.

And...