Welcome South brother...
Yes, I-285 circles Atlanta, but the huge metro area goes out for many miles and many counties. Would you be working in a certain area or county or just flying in and out for work?
Usually, public high schools have multiple feeder middle schools.
Atlanta Magazine puts out an annual issue on high schools, both public and private.
Most private schools are wrapping up their admissions process for next fall. The letters will go out the first week in April.
And yes, our traffic is terrible!