Try to keep your focus in the new school about what it was in the old school. Don't take it all in. Keep your glance close to you--as it was before. Don't "see" people at the back of a group, only those comfortably close. Remember faces and names of people who strike you as already somehow familiar. Make very few friends at first.
I don't mean that you should be aloof, but be a little shy and quiet and let it honestly overwhelm you. Let that show and don't try to hide that. It's real. How the new kids deal with that will tell you very fast many truths about them. These are valuable things to know about them. The young people who sense your need for compassion, a friend, time to adjust--these are people you might want to make time for, if they offer their friendship at some point.

Remember, you don't have to do all the work of "breaking in" at your new school. There is a certain cachet among the Old Line social set at every school to see who can scope out and size up the New Kid on the Block first ... most thoroughly & accurately.

I don't know what "secrets" you are bringing with you--and I guess hoping to keep hidden. I hope you succeed. But don't count on that too much. Primarily, keep your world small. Don't let it outsize your old school--at least at first.

Build a network of support here--you'll find reliable folks whom you can connect with and bounce ideas off of. Stay in touch.

Roadie